WORLDWIDEENGINEERING Material Specification GMW3032 STANDARDS High Strength Sheet Steel, 180 MPa through 700 MPa Yield Strengths 1 Scope This standard covers the requirements for continuous cast sheet steel with specified minimum yield strengths from 180 MPa through 700 MPa and is applicable to uncoated and coated, cold (CR) or hot rolled (HR) low carbon, solid solution strengthened, bake hardenable (BH), and interstitial free (IF) or high strength low alloy (HSLA) substrates with good formability. Continuously hot or cold rolled flat products shall be supplied as coils or sheet. Hot rolled flat products are usually supplied in thicknesses >1.75 mm. These flat products are used for cold forming and for manufacturing of welded tubes. Cold or hot rolled flat products with the appropriate surface type and surface finish are suitable for the application of surface coatings (metallic hot dipping, electrolytic plating, hot spray painting, organic coatings and/or other coatings). This specification does not apply to steel for case hardening and cold reduced, work hardened strips. Additional requirements or agreements shall be specified by regional GM business units, e.g., GM North America (GMNA), GM Europe (GME), GM Brazil (GMB), and GM Korea (GMK). 1.1 Material Description. The material designation is defined by the GM Worldwide (GMW) base metal specification number, steel product type, minimum yield strength, and finish type. The steel product type is designated by CR for cold rolled products, or HR for hot rolled products. Microstructure free of banding, which is caused by the interdendritic segregation of manganese during solidification, is specified for hot rolled HSLA inclusion-controlled grades that are used for chassis applications. A numeral, (180, 210, 240, etc.,) will designate the minimum yield strength level in MPa (Megapascals). A designation of steel type shall be added to BH2, solid solution strengthened grades Re-phosphorized and Interstitial Free (P and IF), structural automotive (SA) and high strength low alloy (LA) steels as shown in Section 8. An “F” designation may be added on engineering and/or manufacturing documents following an LA steel type to specify the steel as inclusion-controlled. A “B” designation is specified for hot rolled LA “F” type grades which need to be free of microstructural banding. Anisotropy Index for banding free grades is listed under Appendix C. The steel grades will correspond to the chemical and mechanical requirements as shown in Table 1 through Table 5. The finish type, Pan alpha character, will designate the finish as E (exposed) or U (unexposed). In addition, products which are not coated shall have the word “Uncoated” added to the call-out after the steel type, but before the finish designation. A special requirement for temper rolling may be required and shall be specified with a “T” designation. The descriptive items in this section (1.1) are used together to form the coding system. Examples of the coding system for engineering part drawings and manufacturing engineering documents are shown in Section 8. 1.1.1 Material Identification. See Appendix A, Table A1. 1.2 Symbols. Not applicable. 1.3 Applicability. Typical applications are coated or uncoated sheet metal parts consisting of high strength sheet steel with specified minimum yield strengths from 180 MPa through 700 MPa. © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 1 of 25 --````,,,``,,,,````,``,-`-``,```,,,`--- Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND. COM. LTDA [700171100585] - CAMILA.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale,2017-05-05 13:45:53 UTC GM WORLDWIDE ENGINEERING STANDARDS GMW3032 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. AS 1391 ASTM E112 ISO 6892 JIS Z 2201 ASTM A370 ASTM E1268 ISO 7438 ASTM A751 EN 10049 ISO 14284 ASTM E45 EN 10247 JIS G 3113 2.2 GM Standards/Specifications. GMW8 GMW14057 GMW15056 GMW16549 GMW11 GMW14058 GMW15282 GMW16656 GMW3005 GMW14700 GMW15425 GMW16823 GMW3011 GMW14704 GMW16066 GMW3059 GMW14729 GMW16086 GMW3224 GMW14829 GMW16170 GMW3335 GMW14872 GMW16546 2.3 Additional References. GWS-5A. Statement of Requirements (SOR). TMC003 Material Safety Data Sheet guidance documents (available at www.gmsupplypower.com).
[email protected]. 3 Requirements This section defines specific requirements for material on delivery, processing, performance and other stages during life cycle. Deviations required for individual GM business units are listed in the Deviation Section at the end of this specification and shall be agreed between Purchasing and supplier. 3.1 Requirements on Test Specimens. Not applicable. 3.2 Requirements on Delivery. 3.2.1 Chemical Requirements. 3.2.1.1 Base Metal. Base metal composition based on product (coil or sheet/blanks) analysis determined per ASTM A751 shall conform to the requirements of Table 1 and Table 2. When end-product (coil/blank) test results are not available, heat analysis may be used. Chemical composition on the end product is the referee method. 3.2.1.2 Surface Treatment. Products coated with a designated lubricant (e.g., mill oil or pre-lube) shall comply with GMW16546 and GMW16656 and/or be approved by the local business unit. 3.2.2 Mechanical Requirements. Products supplied to this specification shall meet the mechanical properties as specified in Table 3 through Table 6. The mechanical test methods to be used are defined in GMW3335 using the appropriate tensile test piece required by the specific region. Tests shall be performed using samples per ISO 6892 Type I, 50 mm gage length ASTM (ASTM International) type sample, ISO 6892 Type II (80 mm gage length) German Institute for Standardization (DIN) type sample or JIS Z 2201 (No. 5 test piece). Plastic strain ratio rm (r-bar) shall be determined at 20% strain. When uniform elongation is <20%, plastic strain values shall be determined at the maximum of uniform elongation. The specific strain level shall be reported with all test results. Strain hardening exponent “n” and strength coefficient “K” value shall be determined at 10% to 20% strain, or at 10% to end of uniform elongation when uniform elongation is <20% unless minimum n-value is <0.12. In these cases, the strain hardening exponent must be determined at 6% to end of uniform elongation. The specific strain range shall be reported with all test results. For tensile tests conducted to ISO 6892, only longitudinal test samples should be used (except for rm value). Conformance to the rm (r-bar) requirement shall be verified at the time of approval and at the time of the initial production shipment, unless --````,,,``,,,,````,``,-`-``,```,,,`--- otherwise required by the local materials engineering or manufacturing department. © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 2 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND. COM. LTDA [700171100585] - CAMILA.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale,2017-05-05 13:45:53 UTC but at the supplier’s choice or by agreement. Specific requirements for the surface texture for each region are detailed in the Deviations Section at the end of this specification. 3.5. The requirements for roughness average (Ra) and roughness peak count (RPc) should be per GMW16823.2.``. GM responsible manufacturing.2. the samples shall be free from visual cracking.3. The amount of strain. Structural Automotive (SA) grades must meet the bending radii as specified in Table 6 for a bending angle of 180 degrees.2.g..3.CAMILA. or metallurgical engineering document etc. Bake Hardening and Work Hardening Indices shall be determined as detailed in Appendix B.2.3. After the test.2.2. Certain applications require that both surfaces of the steel be of exposed surface quality. may all impact the observed bake hardening response.3 Physical Requirements. Exposed (E) surfaces shall be free of defects which might affect the uniform appearance of quality paint or an electrolytic coating.2 Surface Requirements.1 Mechanical Property Requirements of Solid Solution Strengthened and Bake Hardenable Grades.. uncoated and coated sheet steel grades are based on the minimum as-received yield strength (180 MPa.3.2 Bend Test Requirements for Structural Automotive Grades. etc. The steel shall be free from surface defects as negotiated between purchaser and supplier. the actual part temperature/time in the paint bake ovens. Testing shall be performed to ISO 7438.3.2. COM.. 3. The actual or measured bake hardening response for a production part depends on a number of factors that must be considered.````. or zinc-based coated steels shall be capable of achieving a high quality zinc phosphate conversion coating according to GMW3011. Mechanical property requirements of solid solution strengthened (P and IF) and (BH2) cold reduced.4 Surface of Hot Rolled Products without Special Requirements on the Surface Quality. 3.2 Surface Quality.2. All bake hardenable grades shall attain an increase in yield strength of 30 MPa minimum in lower yield strength (longitudinal direction and exclusive of work hardening) after 2% tensile strain and baking at +170 °C for 20 minutes. GMNA Manufacturing Engineering Material Parts Specification (MPS) sheet. cathodic e-coat (ELPO). the products can be supplied in a slightly skin passed condition or with agreement by GM.. defects such as pores.1 Material Thickness and Tolerance. Mechanical properties for the B2 (BH2 grades) are shown in Table 3.1 through 3. 3. LTDA [700171100585] .3.```. 240 MPa. When tested with approved phosphate systems.1 Surface Texture.2.2. A special requirement for temper rolling may be required and shall be specified with a (T) designation.2.2. These products are usually not skin passed. Note: The bake hardening index in this specification is a parameter that characterizes the general bake hardening response of steel. 270 MPa and 300 MPa) as shown in Table 3.2. © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 3 of 25 --````.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale.4 must be met for thin film organic pre-coating qualification.2.3.5 Pre-Treatment/Paint Adhesion (Qualification Testing). Other surfaces shall conform at least to unexposed surface quality (U).2017-05-05 13:45:53 UTC . For unexposed (U) surface. bend test on two (2) low friction mounted test rollers and a punch. Bake hardenable steels have the additional requirement of a bake hardening index (BHI)..3. as a pre-treatment will not be deposited.2. electrodeposited primer. slight indentations. 3.2. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 3..2.3. uncoated. minor scratches..2. The tolerance requirements for various thicknesses and strength levels are listed in GMW3224. 3.2.. transverse to the rolling direction. The additional requirements in 3.-`-``. 3. 210 MPa. which do not affect formability or the application of surface coatings. Steels with thin organic pre-coatings per GMW15056 are excluded from these requirements..3 Roughness of Skin Passed Products. the direction of strain relative to the test direction. the requirements of GMW16170 must be fulfilled.5. are allowed. The detailed engineering part drawing/electronic math file will specify the material thickness and tolerance.``. Detailed requirements will be issued by the responsible formability analysis organization (e. Uncoated hot rolled products shall be supplied in a pickled (descaled) and oiled condition to ensure an adequate processability and a good adhesion of applied coatings.2. Figure B1 and Figure B2. small marks. and slight coloring.`--- Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND. 3. When tested with approved thin film pre-treatments.2. 3. GMW15056 for samples with thin organic pre-coating (applicable to thin film organic coating qualification only).2. GMW16066 for aluminized coatings.3.2.2017-05-05 13:45:53 UTC . The samples shall be scribed per GMW15282 and tested according to GMW14872. 3.`--- stone impact rating of 8. with a minimum --````.2. (exterior) All.2. coating mass. Inclusion control shall only apply to LA grades. inclusion content shall not exceed a rating of 2.3. 3.3 Microstructure. inspection documents.3. a designation may be added to the callout to specify inclusion control (“F” designation.1 Grain Size.2 Inclusions. There should be an agreement with the local business unit which of the two (2) following methods have to be performed.0 for thin and 2. Coating requirements include.5. The marking must be agreed upon between the supplier and purchaser. The creep back shall be evaluated per GMW15282 and meet the requirements stated in the following 3 (three) specifications: GMW3011 for samples that are phosphated.2. and Number 8 or finer for cold rolled substrates. 3. If required. coating composition.3.3. re-tests.3.2.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale. and C. By analysis. packing. 3. 3. sampling.1 Adhesion of the E-coat shall fulfill test requirements of the crosshatch test according to GMW14829: For samples that are phosphated: Rating 0 as-received and after 120 h humidity exposure per GMW14729.2. and GMW15056 for thin organic pre- coatings.2. GMW11 for electrogalvanized coatings. 3. Cerium) (Ce) addition to control inclusion shape (small globular particles are preferred). shall be consistent throughout the thickness of the sheet. GMW16170 for samples with thin film pre-treatment.2. by analysis inclusions shall not exceed size Index 3. Grain size shall be Number 6 or finer for hot rolled substrates.1 Inclusion Analysis Methods. Two (2) optional methods for analysis are available.5.4 Marking. marking shall be carried out on the unexposed surface of full finish coils for outer panels and on the outer side of the coils for inner panels. by analysis at a magnification of 100x. Method A. but are not limited to.. the steel shall meet the following requirements: 3. grain size when tested to ASTM E112.3.0 for heavy. Method B: EN 10247. B. 3. inspections units. Method A: ASTM E45 Method D.2 Pre-treated (zinc Phosphate and thin film) and E-coated samples must meet delamination test requirements according to GMW14704 (Rating 0 or 1 after 48 h test duration). The supplier may limit sulfide inclusions content via ultra-low sulfur steelmaking practices and/or may utilize a calcium treatment or rare-earth element (i. test conditions.3. Testing to this specification will evaluate bonding characteristics to the metal surface. 3.CAMILA. number of tests.2.3. The ink used for marking must be released by the purchaser.2.3.6 Adhesive Compatibility (Qualification Testing).5. LTDA [700171100585] .2. and handling of disputes shall be agreed upon between supplier and the local business unit.4 Creep back resistance shall be inspected on E-coated samples. 4 salt spray per cycle.```.2.2. Plate I-r. For samples with thin film pre-treatment.3. Requirements such as tolerances on product shape and dimensions..2.2.2. 3.3.3 For fully painted applications on exposed (E) surfaces. EXT.2. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 After application of production representative pre-treatment and paint. the material shall also meet the requirements of the stone chip resistance test according to GMW14700. requirements according to GMW16170 shall be met. see Section 8.2 Inclusion Control.3. Exposure C.2..-`-``.``.2. Coding System).5. Refer to coating requirements in GMW8 for hot dipped coatings.````. 3. In case of diameters <20 mm.7 Coating Requirements. they shall not exceed size Index 2.``. and coating adhesion.3. 3. COM..e. Uncoated or zinc based coated steels supplied to this specification shall be capable of being bonded with GM approved adhesives when tested according to GMW16549. 3..3.2...5 Other Requirements.3. © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 4 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.. Method 1/2/3. When required by manufacturing or product engineering to improve edge stretching or bending in some applications.3. CAMILA. Secondary work embrittlement occurs in some interstitial free flat steel products. Contact the GM Weld Council for specific information regarding weldability at weld.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale. If weld seams in cold rolled material are allowed by Global Manufacturing Engineering Department.. testing for spot weldability shall be performed per GWS-5A and approved by the Manufacturing Engineering (ME) .3.4 Secondary Work Embrittlement (SWE). 3.2 Weld Seams in Coils. GMW14058. 3. 3.. weld seams are permissible. For cold reduced coils with unexposed (U) surfaces.1.2 Mechanical Requirements. When determining conformance to this specification. COM. 3. The zones will be identified on the manufacturing requirements document GMNA MPS Sheet or other regional manufacturing requirement documents) of the GM Purchase Order or in the purchased stamping Statement of Requirements (SOR). Not applicable.4. 3.015% carbon by mass. Secondary work embrittlement testing will be required for any steels that have <0. Conformance to this requirement shall be verified at the time of approval and at the time of the initial production shipment.`--- Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND. Not applicable. 3. 3. weld seams are not permissible unless special exceptions are made by the local organization.3.com. but must be avoided in stamped parts. When employing a rounding method. as defined by GM Product Quality Standards.. Punch holes may be used for cold reduced coils to detect weld seams. the last digit to be retained shall remain unchanged.5. Sheet steel supplied to this standard shall be weldable with standard GM Weld Practices and meet spot weld.``.2017-05-05 13:45:53 UTC . When required for qualification. weld seams are not permissible.1. 3. but must be indicated by perforation. an observed value or a calculated value shall be rounded “to the nearest unit” for the last right-hand digit used in expressing the specification requirement.5 Requirements on Other Stages during Life Cycle. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 3. arc weld. successive rounding for calculated values should be avoided. For hot rolled coils. All steel used for exposed (E) surfaces and secondary exposed surfaces located in Zones A. and laser weld acceptance criteria per GMW14057.```. unless otherwise required by the purchaser.-`-``.3.5. the following restrictions shall be considered: For cold reduced coils... The rounding method shall be in accordance to the following: When the digit beyond the last digit to be retained is <5.````.3 Physical Requirements.1..1 Weldability. Provisions shall be made to prevent the addition of such elements (see 5.5. © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 5 of 25 --````. Mechanical property requirements in this specification shall be guaranteed for a minimum of three (3) months after delivery to the manufacturing plant. 3.Weld Department of GM Manufacturing Engineering. When the digit beyond the last digit to be retained is ≥5. 3. and GMW15425 respectively. 3.1. the last digit to be retained shall be increased by one (1) unit.3 Stretcher Strains.1 Additional
[email protected]. For materials qualification.4 Additional Requirements.1 Chemical Requirements. All material supplied to this specification shall be determined to be free of secondary work embrittlement according to GMW16086 or as agreed upon between the purchaser and supplier.3 Processing Requirements.1 Rounding Convention.. For cold reduced coils with exposed (E) or semi-exposed (Z) surfaces.5) from scrap or other materials used in the manufacturing process which would impair the recyclability of the finished components.``. LTDA [700171100585] .3.5. shall be free from stretcher strains for six (6) months. B. required mechanical properties shall be guaranteed for a minimum of six (6) months after coil finishing. pickling weld seams from the manufacturing process of hot rolled coils is permissible without restriction.5. 3. and C.4 Performance Requirements. .``.```. All materials must satisfy applicable laws. or when a change in chemical composition of an existing product has occurred. A list of approved materials can be found in the sheet metal approved source list in GM SupplyPower. Abbreviations. contact the GM Materials Engineering for details on the approval process. If the decision is made to use a not yet approved material..``.. (Document Library Engineering GM North America Product Design). Not applicable. 5. a shorter test can be agreed to between the responsible Engineering department and the supplier. 5.. A new approval must be received for any changes. 5 Rules and Regulations 5.2 Language. all testing and documentation normally required for initial release must be completed. 5...3 Inspection and Rejection.4 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). 7 Notes 7. regulations and recommendations valid in the country of usage. etc. product MSDS/SDS submissions must be in compliance with specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. COM.````. The material approval process must be completed prior to PPAP start date of the part supplied to General Motors.`--- If not otherwise agreed. It is the responsibility of the supplier to inform the customer in a timely manner. without solicitation.CAMILA.-`-``. 7. If not otherwise agreed.2017-05-05 13:45:53 UTC . the part supplier can use GM Material File reference for Production Part Approval Process (PPAP) material approval. AI Anisotropy Index AS Australian Standard ASTM ASTM International BH Bake Hardenable BHI Bake Hardening Index Ce Cerium © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 6 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.1 Glossary.g. manufacturing process. 5.5 All materials supplied to this standard must comply with the requirements of GMW3059. a complete copy of the Material Safety Data Sheet/Safety Data Sheet must be submitted in compliance with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) requirements or other country-specific MSDS/SDS requirements. all release tests shall be repeated and documented by the supplier prior to commencement of delivery of non-conforming bulk supplies. In individual cases..2 Acronyms. Samples of components or materials released to a GM material specification shall be tested for conformity with the requirements of this material specification and approved by the responsible Engineering department prior to commencement of delivery of bulk supplies. For new product submissions.. e. 6 Approved Sources Materials supplied to this specification must be approved by General Motors. and Symbols.1 Legal Regulations. This GM Material File is provided to third parties to reduce redundant testing of materials. the English language shall take precedence. location of manufacture. Restricted and Reportable Substances for Parts. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 4 Manufacturing Process Not applicable. --````. In the event of conflict between the English and domestic language. If approved material already listed is used. properties. and to include documentation of all modifications of materials and/or processes and to apply for a new release. rules. In addition. LTDA [700171100585] .FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 CR Cold Rolled DIN German Institute for Standardization DOI Distinction of Image DP Dual Phase E Exposed ELPO Electrodeposited Primer..2017-05-05 13:45:53 UTC .CAMILA...````.`--- Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.``.-`-``. COM.```.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale. Cathodic E-coat EN European Standard EXT Exterior GHS Globally Harmonized System of Classification and Labeling of Chemicals GMB GM Brazil GME GM Europe GMK GM Korea GMNA GM North America GMW GM Worldwide GPSC Global Purchasing and Supply Chain HAZ Heat Affected Zone HR Hot Rolled HSLA High Strength Low Alloy IF Interstitial Free ISO International Organization for Standardization JIS Japanese Industrial Standards LA Low Alloy ME Manufacturing Engineering MPa Megapascal MPS Material Parts Specification MSDS Material Safety Data Sheet N/A Not applicable P Re-phosphorized PPAP Production Part Approval Process ppm Parts Per Million Ra Roughness Average ReL Lower Yield Stress rm r-bar Rp Proof Stress RPc Roughness Peak Count SA Structural Automotive SDS Safety Data Sheet SOR Statement of Requirements SWE Secondary Work Embrittlement t Thickness T Temper Rolled T Tensile Strength U Unexposed VDA German Association of the Automotive Industry (Verband der Automobilindustrie) © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 7 of 25 --````..``.. LTDA [700171100585] ... ``. The material designation is defined by the applicable GMW base metal material specification which follows the GMW specification number system. an “F” may be included following the steel type.. The surface quality is designated as either E for exposed. The minimum yield strength is specified in Megapascals (MPa) by a numerical designation.. formability and cost.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale.```.3.1 Example of engineering part drawing and/or electronic math data file coding for uncoated high strength steel.````. The engineering part drawing may also include the steel product type (HR or CR). the manufacturing engineering group shall select the desired product type based on such factors as availability.CAMILA.1. if the engineering part drawing does not include the steel product type (HR or CR). IF. COM. or U for an unexposed application and T for temper rolled.2..1 Example of coding for uncoated high strength steel.``.2.. GMW11 for electrogalvanized coatings. P) UNCOATED = Uncoated Substrate Designation E = Surface Quality (see 3. The GMW sheet steel specification shall be called out on engineering drawings and manufacturing engineering documents as follows: 8. and GMW16066 for aluminized coatings. etc. GMW3032M-ST-S-CR180P-UNCOATED-E Where: GMW = Validation Area (GM Worldwide) 3032 = Sequential Number GMW3032 = Material Type (Base material specification) M = Material Type: Metals ST = Category: Steel S = Subcategory: Sheet CR = Steel Product Type: Cold rolled 180 = Minimum Yield Strength (MPa) P = Steel Type (B0.. as follows: Material per GMW3032 The coding system for GMW sheet steel specifications on engineering part drawings and GMNA Manufacturing Engineering Metal Parts Specifications (MPS) Sheets and/or electronic math data files shall use a nomenclature consisting of the material designation.2) --````. B2. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 WH Work Hardening WHI Work Hardening Index YS Yield Strength Z Semi-Exposed 8 Coding System This standard shall be referenced in other documents..-`-``.. LA. Hot rolled HSLA grades that are inclusion controlled and need to have banding free microstructure are designated by “B” in the material designation. If manufacturing and/or product engineering determines the steel requires inclusion-control. 8.`--- © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 8 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.2017-05-05 13:45:53 UTC . For coated applications. minimum yield strength and surface quality or coating designation. and shall include this information on the appropriate engineering documents. In addition. refer to GMW8 for hot dip zinc coatings. LTDA [700171100585] .. drawings. FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale..1 Example of engineering part drawing and/or electronic math data file coding for hot dip zinc coated high strength steel. P) HD60G60G = Coating Designation (GMW8 for details) U = Surface Quality (see 3. LA.2. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 8.3.3.2.2) --````. GMW3032M-ST-S-CR180P-UNCOATED-E Where: GMW = Validation Area (GM Worldwide) 3032 = Sequential Number GMW3032 = Material Type (Base material specification) M = Material Type: Metals ST = Category: Steel S = Subcategory: Sheet CR = Steel Product Type: Cold rolled 180 = Minimum Yield Strength (MPa) P = Steel Type (B0.2.1.2. LA. IF. IF.-`-``.2.``.````. B2. COM.. 8. LTDA [700171100585] .2 Example of coding for hot dip zinc coated high strength steel..2017-05-05 13:45:53 UTC .`--- © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 9 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND... GMW3032M-ST-S-CR180P-HD60G60G-U Where: GMW = Validation Area (GM Worldwide) 3032 = Sequential number GMW3032 = Material Type (Base material specifications) M = Material Type: Metals ST = Category: Steel S = Subcategory: Sheet CR = Steel Product Type: Cold rolled 180 = Minimum Yield Strength (MPa) P = Steel Type (B0.2 Example of manufacturing engineering document coding uncoated high strength steel.2) 8. P) UNCOATED = Uncoated Substrate Designation E = Surface Quality (see 3. B2.``.```..CAMILA.. ```.`--- 3032 = Sequential Number GMW3032 = Material Type (Base Material Specifications) M = Material Type: Metals ST = Category: Steel S = Subcategory: Sheet 420 = Minimum Yield Strength (MPa) LA = Steel Type (B0. IF.3.2) 8.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale. the HR or CR designations shall not be used.CAMILA. Per 1.-`-``. LA. GMW3032M-ST-S-420LA-EG60G60G-U Where: GMW = Validation Area (GM Worldwide) --````.. P) EG60G60G = Coating Designation (GMW11 for details) U = Surface Quality (see 3.2.3. LTDA [700171100585] . IF.2.2.``.. For manufacturing or Global Purchasing and Supply Chain (GPSC) purchasing document coding.``. COM.1 Example of engineering part drawing or electronic math file coding for electrogalvanized coated high strength steel....2) © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 10 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.1.3.2. as necessary. 8.2. the HR or CR designation may be used. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 8. P) HD60G60G = Coating Designation (GMW8 for details) U = Surface Quality (see 3.````.3 Example of Coding for Electrogalvanized Coated High Strength Steel. B2. LA.2017-05-05 13:45:53 UTC .2 Example of manufacturing engineering document coding for hot dip zinc coated high strength steel: GMW3032M-ST-S-CR180P-HD60G60G-U Where: GMW = Validation Area (GM Worldwide) 3032 = Sequential number GMW3032 = Material Type (Base Material Specifications) M = Material Type: Metals ST = Category: Steel S = Subcategory: Sheet CR = Steel Product Type: Cold rolled 180 = Minimum Yield Strength (MPa) P = Steel Type (B0.. the HSLA steels (except for SA grades) <550 MPa. for engineering part drawing or electronic math file coding.. B2. B2. 8.2) 8.CAMILA.. COM. P) EG60G60G = Coating Designation (GMW11 for details) U = Surface Quality (see 3.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale. P) EG60G60G = Coating Designation (GMW11 for details) T = Temper Roll Designation © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 11 of 25 --````.3.2.1 Example of engineering part drawing or electronic math file coding for temper rolled electrogalvanized coated high strength steel.``.2 Example of manufacturing engineering document coding for electrogalvanized coated high strength steel. GMW3032M-ST-S-CR420LA-EG60G60G-U Where: GMW = Validation Area (GM Worldwide) 3032 = Sequential Number GMW3032 = Material Type (Base Material Specifications) M = Material Type: Metals ST = Category: Steel S = Subcategory: Sheet CR = Steel Product Type: Cold rolled 420 = Minimum Yield Strength (MPa) LA = Steel Type (B0..`--- Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.4 Example of coding for hot dip coated high strength steel requiring temper roll.``. IF.2017-05-05 13:45:53 UTC . LTDA [700171100585] .4.. GMW3032M-ST-S-340LA-EG60G60G-T Where: GMW = Validation Area (GM Worldwide) 3032 = Sequential Number GMW3032 = Material Type (Base Material Specifications) M = Material Type: Metals ST = Category: Steel S = Subcategory: Sheet 340 = Minimum Yield Strength (MPa) LA = Steel Type (B0. LA.````.3..-`-``...2.. IF.```. B2. LA. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 8. COM.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale. LA..CAMILA.2 Example of manufacturing engineering document coding for temper rolled electrogalvanized coated high strength steel..2. P) F = Inclusion-Controlled HD60G60G = Coating Designation (GMW8 for details) U = Surface Quality (see 3. B2.`--- Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND..```. LTDA [700171100585] .3.````.5 Example of coding for hot dip coated high strength steel requiring inclusion control.``.-`-``.2.4.5.1 Example of engineering part drawing or electronic math file coding for inclusion-controlled hot dip coated high strength steel. IF..2017-05-05 13:45:53 UTC . IF.``. P) EG60G60G = Coating Designation (GMW11 for details) T = Temper Roll Designation 8. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 8.2) © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 12 of 25 --````. GMW3032M-ST-S-CR340LA-EG60G60G-T Where: GMW = Validation Area (GM Worldwide) 3032 = Sequential Number GMW3032 = Material Type (Base Material Specifications) M = Material Type: Metals ST = Category: Steel S = Subcategory: Sheet CR = Steel Product Type: Cold rolled 340 = Minimum Yield Strength (MPa) LA = Steel Type (B0. 8.... LA. GMW3032M-ST-S-340LAF-HD60G60G-U Where: GMW = Validation Area (GM Worldwide) 3032 = Sequential Number GMW3032 = Material Type (Base Material Specifications) M = Material Type: Metals ST = Category: Steel S = Subcategory: Sheet 340 = Minimum Yield Strength (MPa) LA = Steel Type (B0. B2. 2017-05-05 13:45:53 UTC .CAMILA. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 8.. GMW3032M-ST-S-HR340LAF-HD60G60G-U Where: GMW = Validation Area (GM Worldwide) 3032 = Sequential Number GMW3032 = Material Type (Base Material Specifications) M = Material Type: Metals ST = Category: Steel S = Subcategory: Sheet HR = Steel Product Type: Hot rolled 340 = Minimum Yield Strength (MPa) LA = Steel Type (B0. P) F = Inclusion-Controlled HD60G60G = Coating Designation (GMW8 for details) U = Surface Quality (see 3.````.2.5. LA.-`-``.. COM.3 Example of engineering part drawing or electronic math file coding for Structural Automotive hot rolled uncoated steel --````..FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale...``.2) © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 13 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.2) 8.5.2.3..2. B2.```. IF.. LTDA [700171100585] .`--- GMW3032M-ST-S-HR440T-SA-UNCOATED-U Where: GMW = Validation Area (GM Worldwide) 3032 = Sequential Number GMW3032 = Material Type (Base Material Specifications) M = Material Type: Metals ST = Category: Steel S = Subcategory: Sheet HR = Steel Product Type: Hot rolled 440 = Minimum Tensile Strength (MPa) T = Tensile Strength SA = Structural Automotive UNCOATED = Uncoated Substrate Designation U = Surface Quality (see 3.3.``.2.2 Example of manufacturing engineering or GPSC purchasing document coding for inclusion-controlled hot dip coated high strength steel. 2017-05-05 13:45:53 UTC ..3. LTDA [700171100585] . LA.CAMILA.2) --````.`--- © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 14 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.. GMW3032M-ST-S-HR550LAF-B-HD60G60G-U Where: GMW = Validation Area (GM Worldwide) 3032 = Sequential Number GMW3032 = Material Type (Base Material Specifications) M = Material Type: Metals ST = Category: Steel S = Subcategory: Sheet HR = Steel Product Type: Hot rolled 550 = Minimum Yield Strength (MPa) LA = Steel Type (B0.``.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale.2. IF...````.. B2. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 8...5.```. COM.-`-``.``.2. P) F = Inclusion-Controlled B = Banding Controlled HD60G60G = Coating Designation (GMW8 for details) U = Surface Quality (see 3.4 Example of engineering part drawing or GPSC purchasing document for banding controlled hot dip coated high strength steel. .1. Table 1.4.2.``.2.2. Table 2 updated to show HR designations for 550LA and higher strength grades.3.5. 3.3.2. Appendix A (added).3 Phosphateability/Paint Compatibility.2. Appendix C: Tables C1.1.2. Table 5 (elongation for HR550 modified.2.2.1.3.2.1 End-product referee method.3..2.3.1.3.1.1.1. Table 3.2.2.2.3.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale.2.1. 3.1..1.````.1. Appendix C (added).3.2. 5.3. 3.1.1.1.1.1.1. 3.3..2.2. 3.1.3 references). 3.1.3. Appendix A . 1. 3.1.2.2. the document is also valid for Isuzu. Table 2.1.1.1. 3. C2.3.2.1.1.1.6.2. 2 OCT 2000 With this released Revision A. 3. 3.1. Rework of paragraphs 1.1. A3.1. Table A2. SA grades added.4.1.1.1. Paragraphs 7 and 8 updated.3. Table 6 added for Hot Rolled Structural Automotive Grades for Chassis Applications.3. Deviations – 3..1-8.3.2.1. 2 (2.2. Appendix B (Note 1 added). Appendix B (renamed). Table 3.2. and a team of GM Europe.2. 3.1. 7. 3.4.1.2. Table 4.1 GM Holden (removed regional specs.4. 2.3.1.1.1.2.1 Spot Weld requirements updated and Laser Weld requirements added. All tables were reworked.2 Surface Treatment with revised specifications GMW16546 and GMW16656.2. 3. A3.1. For all chemical composition tables: the required aluminum was changed from maximum to minimum required value. 3.CAMILA. 5.1. A. 3. 5.2. Table 7.3.5.3.2.3.3. Attention: The grade referenced on drawings or other documentation as GMW3032M-ST-S HR210 is replaced by GMW2M-ST-S HR1.2.2 Updated References.5 3.1.2. Table 1.2. 3.1.2. Table 5. 3. Appendix C updated.1. HR460. New Appendix C added for Anisotropy Index for banding free grades.1.1. 3.1. 1.3.2.2. 1.3.3. the manganese content is now equal for HR and CR grades. 3. 3.2. 270P. 7: Addition of Dualphase Grades (DP).1.1. A3. 3.2. 3.1.4).1. Table A1. 3. GM Europe updated. 3.1. 3.1.1.3. A3. 3. 2. Note 8 added).``. 3.3. 7. and Table Dev 1 updated. 3.3.1. 8 JUN 2014 Appendix A. (GME Specification Center) 3 AUG 2002 Revision B was approved on 17/DEC/2001 // Revised paragraphs 2.2. 3. 3. 2.3.2. A3.2.3. 7.2. 3.3. LTDA [700171100585] .1.1.1.1.2.3.1 updated.2.1.3. 3.2017-05-05 13:45:53 UTC .. 3. 3.2. Table 5. 3.1.1. 7. COM.5.1.3.2 GM Holden added. and Asia Pacific materials engineering experts excluding ISUZU in February 1999.2. 7.3. 2.2.2. 3.1. Revised current specification based on mill capability and global requirements.2.2.2.1: Banding-free microstructure requirements added. A3.2. Deviations . 3. Table 2.1. Table Dev 2 (Global Sheet Metal Specialist Team) 6 OCT 2009 Updated specification template. Removed GM6180M from 2.4. 3.2 Surface Treatment per GMW14019.1.1 Updated ASTM Plate. CR460.1.4. 3.1. 3.2.3.2. 2. and inclusion of SA (all grades). 1.5. Clarified language in Section 6 Approved Sources.2.2.1.1.2.2. Deviation Section: Paragraphs 3. and added examples of structural automotive and banding free grades.3. Appendix A updated by deleting cross- reference Tables A1 and A2. Latin America.. 3.3. Paragraph 3. 2.2. 7.4.3. 2.3 Initial Source Approval added.4.3.3. 300P.2. (GME Specification Center) 4 OCT 2005 Revised paragraphs 1.2. Table 6. paragraphs 1.2.2. 7.3.2.2. 3. 3. Paragraphs 2 and 3.1. Paragraph 3.1. 3. Specification corrected to JIS G 3113-SAPH440. 6.2. It was first approved by GM Automotive Operations-North America Sheet Metal Specialists Team. A3. 3. A6. added semi-exposed surface.1.2.2.1.2.5.1. Issue Publication Date Description (Organization) 1 JUN 1999 Initial publication.4.2. Table 4.3.2.1.1.2. 7.3. Table 3 updated by removing B0 bake hard grades. 3. and added a new cross-reference Table A1 for Structural Automotive grades. Deviations – 3.2.3.2. 5 AUG 2007 Revised title.1. updated to GMW14704.3. A3.4. Removed obsolete reference specification GMW14019. A3.1.2: Bend Requirements for Structural Automotive Grades added. Table Dev 1.1.2. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 9 Release and Revisions This standard was originated in July 1998.7 and 7 updated. 7.2. (Ferrous Sheet Metal Global Subsystem Leadership Team) © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 15 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND. 3.Deviation section. 5.1.3.3. Table 5.1.```.. Table 4 (240LA requirements revised).1.1. C3 and C4 deleted.1-2.1. Paragraphs 3.1. 3. Table A1.1.`--- rolling requirements designation added.5 Coating Adhesion by Bonding) (GME only) (Global Sheet Metal Specialist Team) 7 JAN 2013 Paragraph 1. 2. Updated 3.1. and Section 8 Coding System.3.2.3.2. 3.2 Mechanical requirements updated.3.2.2.1.3.4 Updated to GMW16086.2. 3. 5.3.1. to reflect engineering and manufacturing requirements for high strength steels.1 (all tables).-`-``.1.1.2.1. 7.1.1. Deletion of grades: 240P. Paragraph 3. It was first published in June 1999.2. 3.1. 8 (8.3.1. 1. and temper --````.3. 7.2.2.3.1. 60 HR700LA Note 4 0.12 2. Note 4: Includes IF. of 0. Note 5: Structural Automotive (SA) grades carbon equivalence..010 0. See Deviations Section. Note 5: All P and IF grades with <0.030 0.```.015 0.50 0.030 0.CAMILA. Note 3 GMW3032M-ST-S C Mn P S Al Si Designation % Maximum % Maximum % Maximum % Maximum % Minimum % Maximum 240LA 0.040 0.015 0.12 0.12 1.12 1.24 maximum.. 0.015 0.`--- 2(% P) +4(% S).10 1. Note 5 % Maximum % Maximum % Maximum % Maximum % Minimum % Maximum CR180 0.040 . titanium.50 0.10 0.030 0. COM. Note 2: In addition to requirements shown in Table 1.015 0.030 0.030 0.030 0.10 0.00 0..-`-``.70 0.030 0.50 Note 1: Chemical composition based on product (coil or sheet/blank) analysis.12 2.015 0.70 0.e.015 0.90 0.015 0.12 1.12 1.030 0. LTDA [700171100585] .16.015 0. Note 2: LA grades must contain intentional additions of micro alloying elements (i.015 0.12 1.010 0. Table 2: Cold or Hot Rolled High Strength Low Alloy Grades Chemical Composition Note 1.030 0.015 0.0003% (3 ppm) Boron. Note 4: Grades 550 and above only available as HR substrates.06 0.015 0.030 0.30 CR270 0.50 CR210IF 0.015 0.01 0.01 0.50 CR300 0.50 CR240IF 0.70 0. B0 and B2 grades.030 0. - Note 1: Chemical composition based on product (coil or sheet/blank) analysis. vanadium) for the Low Alloy (LA) steels together shall be ≤0.22%.50 340LA 0.2017-05-05 13:45:53 UTC .015 0. Note 3: The amount of micro alloying elements (niobium..24 maximum where CE = % C + (% Si/30) + (% Mn/20) + --````.30 CR240 0. Note 2. Note 2. © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 16 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.70 0.025 0.50 380LA 0.08 0.70 0.030 0. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 Table 1: Bake Hardenable and Solid Solution Strengthened Grades Chemical Compositions Note 1.08 0.12 1.025 0. Note 3: % C + % P ≤0.10 0.030 0. where CE = % C + (%Si/30) + (%Mn/20) + 2(%P) + 4(%S)..60 0.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale.08 0.030 0. Note 3 GMW3032M-ST-S C Mn P S Al Si Designation Note 4.12 1.030 0.030 0.50 0.60 420LA 0.00 0.025 0.11 0.50 CR180IF 0.030 0..50 300LA 0.015 0.60 500LA 0.60 HR650LA Note 4 0.10 0.60 SA (all grades) Note 5 .015% carbon shall have a minimum of 0. and/or vanadium) and/or shall have a carbon equivalence. CE.5.08 0. titanium.``. P.50 0.60 HR550LA Note 4 0.030 0. CE.010 0.````.00 0..30 0. % Cu +% Ni + % Cr + % Mo ≤0.030 0..60 0.015 0.15 1. .30 CR210 0.50 270LA 0.015 0.025 0.``.12 1.030 0.025 0. of 0.80 0.030 0. niobium.015 0.08 0.01 1. 1 1.3 1... if the yield stress cannot be easily recognized.9 --.. Note 8: Valid only for GME.6 mm. --- CR240IF 240 300 360 34 32 38 1. COM. Note 6: Calculation by (r0+r90+2r45)/4. Note 5: For thickness >1. --- CR270B2 270 330 360 28 26 32 0.13 0.0 0. LTDA [700171100585] .14 30 Note 1: Additional demands can be specified by local units.1 --.````. the minimum value is reduced by 4 units.. the actual processing conditions (temperature cycle.`--- Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.20 ---- CR180IF 180 240 330 38 36 42 1. Note 4 (%) Note 3 Note 6 Designation Minimum Maximum Minimum Minimum Minimum Minimum Minimum Minimum Minimum Minimum Minimum CR180P 180 240 300 35 33 39 1. 0. ReL. Note 4: ZnNi and Galvanneal coated steels: rm (r-bar) shall be reduced by 0.. the minimum value for elongation is reduced by 2 units.16 0.19 30 CR210P 210 270 320 33 31 37 1. otherwise the values shall be the lower yield stress. total elongation to be reduced by 2%.1 0.18 0.15 30 CR300B2 300 360 390 26 24 30 0.3 1..5 mm. etc.15 0. For vehicle design.2017-05-05 13:45:53 UTC .0 --.17 0.16 0.17 30 CR270P 270 330 360 28 26 32 1.0 0.17 --- CR240B2 240 300 340 30 28 34 1.3 --. --. Rp 0..17 0.1 1.) shall be considered.17 30 CR240P 240 300 340 30 28 34 1. © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 17 of 25 --````.3 1.```. the minimum r-value requirement will be 1. n value to be reduced by 0. --. 0.1 0.1.15 --.-`-``.3 --.2 0.01. Note 7: The BH2 index requirement in this specification is used to characterize the general bake hardening response of steel.19 ---- CR210B2 210 270 320 33 31 37 1.19 ---- CR210IF 210 270 340 36 34 40 1.19 0. 0. For thickness ≤0. 0.``.1 1.1 0. 0.14 --.5 mm.0.``. Note 2: The yield stress values shall apply for the 0.. 0.2 proof stress.9 --. pre-straining. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 Note 1 Table 3: Cold Rolled Bake Hardenable and Solid Solution Strengthened Grades Mechanical Property Requirements Total Total rm Total Yield Tensile Elongation Elongation (r-bar) n value BH2 Elongation r0-20 n value GMW3032M-ST-S Strength Note 2 Strength 80 mm JIS Number 5 Note 4 Note 8 Note 4 Note 4 Note 7 50 mm Note 5 Note 8 (MPa) (MPa) (%) 50 mm (MPa) (%) Note 3.CAMILA.20 ---- CR180B2 180 240 300 35 33 39 1.7 mm and >0. Note 3: When the specified nominal thickness <0.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale.2. .01.2 proof stress.12 CR420LA 420 520 480 18 16 22 0..13 CR380LA 380 460 450 20 18 24 0. Note 3: n-value tested from 6% to end of uniform elongation. --````.15 CR300LA 300 380 370 24 22 28 0.2. LTDA [700171100585] . © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 18 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale.15 CR270LA 270 350 330 26 24 30 0. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 Table 4: Cold Rolled High Strength Low Alloy Grades Mechanical Property Requirements Note 1 Total Total Total Tensile Elongation GMW-3032M-ST-S Yield Strength Note 2 Strength Elongation Elongation JIS Number 5 n-value 50 mm 80 mm Note 4 (MPa) (MPa) 50 mm (%) (%) (%) Designation Minimum Maximum Minimum Minimum Minimum Minimum Minimum CR240LA 240 320 320 28 26 32 0.. Note 4: ZnNi and Galvanneal coated steels: n value to be reduced by 0.14 CR340LA 340 420 410 22 20 26 0. (Rp) 0.. otherwise the values shall be the lower yield stress.````..CAMILA.``..```. if the yield stress cannot be easily recognized. R eL.09 Note 3 Note 1: Additional demands can be specified by local units.2017-05-05 13:45:53 UTC . COM.11 Note 3 CR500LA 500 600 560 16 14 20 0..`--- Note 2: The yield stress values shall apply for the 0.-`-``.``. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 Table 5: Hot Rolled High Strength Low Alloy Grades Mechanical Property Requirements Note 1 Tensile Total Total Total Elongation Yield Strength Note 2.11 Note 5 HR500LA 500 600 560 20 18 24 0. the minimum total elongation shall be reduced by 3%.08 Note 5 Note 6 HR650LA 650 780 700 14 12 20 0..12 HR420LA 420 520 480 22 20 26 0..06 Note 5 Note 1: Additional demands can be specified by local units..``.07 Note 5 HR700LA Note 6 700 850 750 12 10 18 0.```.13 HR380LA 380 460 450 23 21 27 0.2 proof stress..2017-05-05 13:45:53 UTC . COM. Note 2: The values stated apply to product thicknesses from 2 mm to 8 mm in the as-delivered condition.``.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale.15 HR300LA 300 380 370 27 25 31 0. LTDA [700171100585] . ReL.16 HR270LA 270 350 330 29 27 33 0. Higher or lower values of thickness and other as delivered conditions may be agreed at the time of ordering.-`-``. --````.`--- © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 19 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND. Note 3 Strength Elongation Elongation GMW3032M-ST-S Note 2 50 mm 80 mm (JIS Number 5) n-value Note 4 (MPa) 5 mm (MPa) (%) (%) Note 2 (%) Designation Minimum Maximum Minimum Minimum Minimum Minimum Minimum HR240LA 240 320 290 31 29 35 0..01. Note 3: The yield stress values shall apply for the 0. Rp 0. if the yield stress cannot be easily recognized. otherwise the values shall be the lower yield stress. Note 6: For hot-dipped zinc coated HR grades with Yield Strength (YS) ≥550 MPa.````..2. Note 4: Galvanneal coated steels shall be reduced by 0.14 HR340LA 340 420 410 25 23 29 0.09 Note 5 HR550LA Note 6 550 650 610 18 16 22 0.CAMILA.. Note 5: n-value tested from 6% to end of uniform elongation. See Deviations Section. 2.0 <2. COM. Rp 0.15 <4.3 ≤t Angle Thickness.0 6..0 <2..-`-``. ReL.5 ≤t 3.CAMILA.``.0 T ≥2.`--- © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 20 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.0 t × 1.5 Note 1: Additional demands can be specified by local units. if the yield stress cannot be easily recognized.2017-05-05 13:45:53 UTC .2 proof stress.6 ≤t 2.. Note 2 Total Elongation (JIS Number 5) Yield Strength Note 3 50 mm Bendability Tensile (%) GMW3032M-ST-S Strength Thickness.. --````.0 ≤t 6.0 ≤t 1..````.0 ≤14.0 <6..0 HR370T-SA 370 225 225 215 32 33 35 36 37 25 T × 0.0 ≤t <8. Note 3: The yield stress values shall apply for the 0.```.0 ≤t 2. t t <6.. t (MPa) Inside Radius (mm) (mm) Bend 8. Note 2: Test per ISO 7438 transverse to rolling direction.0 180 HR440T-SA 440 305 295 295 29 30 32 33 34 22 T × 1. LTDA [700171100585] .5 t × 1.15 ≤t 4.``.0 (mm) Designation Minimum Minimum Minimum Minimum Minimum Minimum Minimum Minimum Minimum Minimum 180 t <2. t Thickness. otherwise the values shall be the lower yield stress.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale.5 <3. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 Table 6: Hot Rolled Structural Automotive Grades (Intended for Chassis Applications) Mechanical Property Requirements Note 1.3 ≤14. ``. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 Appendix A Table A1: Structural Automotive Grades GM North GM Worldwide GM Europe GM Brazil GM Korea America GMW3032M-ST-S.CAMILA.2017-05-05 13:45:53 UTC ... COM. JIS G 3113-SAPH370 HR370T-SA GMW3032M-ST-S.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale.``...````.-`-``.. LTDA [700171100585] .```.`--- Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND... JIS G 3113-SAPH440 HR440T-SA © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 21 of 25 --````. COM... GM WORLDWIDE ENGINEERING STANDARDS GMW3032 Appendix B Figure B1 and Figure B2 illustrate the definition of the Bake Hardening Index (BHI) and Work Hardening Index (WHI) on schematic diagrams of stress-strain curves..```.````... Figure B1: Determination of Bake Hardening Figure B2: Determination of Bake Hardening and (No Pre-Strain) Work Hardening Indexes (Pre-Strain) Note 1 1 Note 170°C/20 170°C/20minutes minutes --````. This standard is independent of the minimum time and temperatures required to effectively activate bake hardening. Standard test specimens will be taken from unstrained and unbaked material in the longitudinal (rolling) direction and tested per ISO 6892 or ASTM A370. respectively. © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 22 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale..-`-``. and the BH2 bake hardening and work hardening indices determined at 2% pre-strain are shown on Figure B1 and Figure B2.CAMILA. Graphical descriptions of the BH 0 bake hardening index determined at 0% pre-strain (not pre-strained)..2017-05-05 13:45:53 UTC .`--- ° Note 1 Note 1 170 C/20 170°C/20 minutes minutes BH2BH2 BHoBHo Stress Stress Stress Stress WH WH WH =WH Work = Work Hardening hardening Strain Strain 2% 2% Strain Strain Pre-Strain Pre-Strain Note 1: The industry standard time and temperature to evaluate general bake hardenability of steel is +170 °C for 20 minutes. The GM standard minimum ELPO paint bake oven requirements of +160 °C for 15 minutes for heavy metal sections is adequate to meet the intent of the bake hardening requirements of these steels. The bake hardening index for bake hardenable steels shall be determined on specimens that are not pre-strained and 2% pre-strained and baked at +170 °C for 20 minutes. LTDA [700171100585] .``.``. ``.0 level of microstructural orientation according to ASTM E1268.2017-05-05 13:45:53 UTC ...-`-``..FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale. the steel shall meet an Anisotropy Index.. Example: GMW3032M-ST-S-HR550LAF-B-Uncoated-U --````.CAMILA..````. LTDA [700171100585] ..`--- © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 23 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND.```. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 Appendix C When specified as a suffix letter B. COM.``.. AI = 2. and to Japanese Industrial Standard JIS Z 2201 (No. shall be 20 MPa minimum.3 CR240B2 1. --````. GM Europe: Total elongation for coated and uncoated HR550LA shall be 13% minimum.0003% (3 ppm) boron or must have a BH2 value of 20 MPa minimum. respectively. Deviations on requirements for individual GM business units.2017-05-05 13:45:53 UTC . GM North America. Dev 3. GM Brazil. Dev 3. press oils.2 Surface Treatment. In case of disputes or conflicts. The material must be capable of achieving an even phosphate coating in the purchaser’s phosphate system. COM.. BH2.2.06% is permissible with welding approval.2. The phosphate coating weight and crystal morphology must be as expected for that type of sheet metal material phosphate coating in the purchaser’s phosphate system.2.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale.2 CR270B2 1.. Dev 3.. GM Holden: Maximum yield strength for CR240LA (Table 4) shall be increased by 30 MPa for product thickness <1.. GM Brazil: The rm (r-bar) values for bake hardenable and solid solution strengthened grades shall meet the requirements in Table Dev 1. mill oils. The contents of unlisted elements are to the choice of the producer as long as they do not affect the specified requirements and the production processes.``. GM Europe: The chemical composition of the base material in percent (%) by mass determined per ISO 14284 shall meet the requirements listed in Table 1 and Table 2. GM North America: Bake Hardening Index (shown in Table 3).1. GM Europe. All P grades with <0. shipping oils.``.`--- Table Dev 1: Bake Hardenable and Solid Solution Strengthened Grades Mechanical Property Requirements Note 1 GMW3032M-ST-S Designation rm (r-bar) CR180P 1. due to only those with deviations are included in this section.-`-``.3 CR180B2 1. applied to the material by the steel mill and the parts manufacturer must be removable in the purchaser’s phosphate pre-cleaning system..0 Note 1: GM Korea : Australian and Japanese Steel Suppliers for Holden shall perform tensile testing to Australian Standard AS 1391. and GM Korea shall apply..2 Mechanical Requirements. GM Korea: For cold rolled and hot rolled steel supplied to this specification.0 CR300B2 1.````.1. GM Korea: Steel products shall have chemical composition which is agreed between purchaser and supplier which is capable of achieving the desired mechanical properties specified in GMW3032M-ST-S. etc.8 mm.3 CR210P 1. 5 test piece). Designation of carry over parts to be used on global platform vehicles must be changed into the new GMW Material Description System..1 Base Metal. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 Deviations Note: Paragraph numbers may not appear sequentially.. the corresponding local standards and norms.CAMILA.```. © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 24 of 25 Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND. LTDA [700171100585] .015% carbon must contain a minimum of 0.3 CR210B2 1. GM North America: Maximum phosphorus content in Table 2 of 0. GM Brazil: Designation of carry over parts to be used on global platform vehicles must be changed into the new GMW Material Description System. ``.3. Dev 3. In all cases. Note 2.````.. COM. Dev 3. Note 4 Table Dev 2: Typical Inside Bend Radii Cold and Hot Rolled HSLA Steel Cold Rolled Hot Rolled GMW3032M-ST-S Designation Bend Radius/Thickness Note 5 Bend Radius/Thickness 270 1/2 T 1T 300 1/2 T 1T 340 1/2 T and L 1T 380 1 T and L 1 T and L 420 1 T and L 1 T and L 500 2 T and L 3 T and L 550 N/A 3 T and L 650 N/A 3 T and L 700 N/A 3 T and L Note 1: Ratio of bend radius to thickness T = transverse specimen and L = longitudinal specimen.FERREIRA@DYTECHAUTO No reproduction or networking permitted without license from IHS Not for Resale.2.2017-05-05 13:45:53 UTC . not the minimum ordered thickness.2 Surface Requirements.. Note 5: N/A = Not applicable.``. corrosion. GM North America: Refer to GMW16823.2. GM Europe: Exposed (E) and unexposed (U) cold rolled and coated products are to be temper rolled.3. GM WORLDWIDE ENGINEERING STANDARDS GMW3032 Dev 3.40 mm. GM Korea: To satisfy Holden exterior topcoat system requirements (GMW3005). © Copyright 2014 General Motors Company All Rights Reserved June 2014 Page 25 of 25 --````.1 Surface Texture. Note 2: The suggested minimum bending radius is on nominal rolled thickness. Dev 3.2 Surface Quality. the surface texture of materials used for highly visible exterior surface of the vehicle must not decrease the distinction of image (DOI) or gloss of the applied paint.2. debris or any other defects which would be objectionable on the finished part.2.2.`--- Copyright General Motors Company Order Number: W1978614 Provided by IHS under license with General Motors Company Sold to:DYTECH BRASIL IND. Note 4: These data are only applicable to tooling design. GM Korea: All products shall be free from stretcher strains for six (6) months unless otherwise agreed upon between purchaser and supplier.. Surface finish and quality should be negotiated between the steel mills and parts manufacturer to be appropriate to the final use of the part.CAMILA.```.. GM North America: Refer to GMW16823. Note 1. add 1/2 “T” to radius shown in table. Note 3: For thickness over 4. stains. Note 3. the supplied steel and the parts made from that steel shall be clean and free of scale.3.2.... GM Europe: Refer to EN 10049.-`-``. LTDA [700171100585] .3 Physical Requirements.