A574.1112550-1.pdf

Designation: A574 − 13Standard Speciﬁcation for Alloy Steel Socket-Head Cap Screws1 This standard is issued under the ﬁxed designation A574; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. 1. Scope* 1.1 This speciﬁcation covers the requirements for quenched and tempered alloy steel hexagon socket-head cap screws, 0.060 through 4 in. in diameter where high strength is required. 1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard. NOTE 1—A complete metric companion to Speciﬁcation A574 has been developed—A574M; therefore no metric equivalents are presented in this speciﬁcation. 1.3 The following hazard caveat pertains only to the test method portions, sections 5.1, 5.6, 8, and 12, of this speciﬁcation. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2. Referenced Documents 2.1 ASTM Standards:2 A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products E112 Test Methods for Determining Average Grain Size F606 Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets F788/F788M Speciﬁcation for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series F1470 Practice for Fastener Sampling for Speciﬁed Mechanical Properties and Performance Inspection F1789 Terminology for F16 Mechanical Fasteners F1940 Test Method for Process Control Veriﬁcation to 1 This speciﬁcation is under the jurisdiction of ASTM Committee F16 on Fasteners and is the direct responsibility of Subcommittee F16.02 on Steel Bolts, Nuts, Rivets and Washers. Current edition approved April 1, 2013. Published June 2013. Originally approved in 1967. Last previous edition approved in 2012 as A574 – 12. DOI: 10.1520/A0574-13. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [email protected]. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website. Prevent Hydrogen Embrittlement in Plated or Coated Fasteners F2282 Speciﬁcation for Quality Assurance Requirements for Carbon and Alloy Steel Wire, Rods, and Bars for Mechanical Fasteners F2328 Test Method for Determining Decarburization and Carburization in Hardened and Tempered Threaded Steel Bolts, Screws and Studs 2.2 ASME Standards:3 B18.3 Socket Cap, Shoulder, and Set Screws B18.12 Glossary of Terms for Mechanical Fasteners B18.24 Part Identifying Number (PIN) Code System Standard for B18 Fastener Products 3. Terminology 3.1 Deﬁnitions of Terms Speciﬁc to This Standard—The deﬁnition of terms used in this speciﬁcation shall be as speciﬁed in Terminology F1789, ASME B18.12, or the applicable referenced standards, unless otherwise deﬁned herein. In the event that there are differences for a given term, ASTM deﬁnitions shall be used. 4. Ordering Information 4.1 Orders for socket head cap screws under this speciﬁcation shall include the following information: 4.1.1 ASTM designation and year of issue. 4.1.2 Name of the screw (SHCS). 4.1.3 Quantity (number of pieces by size). 4.1.4 Dimensions, including nominal thread designation, thread pitch, and nominal screw length. 4.2 Orders for socket head cap screws shall include the following optional requirements if speciﬁed by the purchaser: 4.2.1 Inspection at point of manufacture. 4.2.2 Coating, if a protective ﬁnish other than those, which are described in 5.5 is required, it must be speciﬁed (see 5.6). 4.2.3 Certiﬁed test reports, as required (see Section 15). 4.2.4 Additional testing (see 12.1). 4.2.5 Special packaging (see 18.1.2). 3 Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990, http:// www.asme.org. *A Summary of Changes section appears at the end of this standard Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States Copyright by ASTM Int'l (all rights reserved); Mon Feb 17 12:46:48 EST 2014 1 Downloaded/printed by Universidad Santiago de Chile pursuant to License Agreement. No further reproductions authorized. Larger sizes and longer lengths shall be cold or hot headed at the option of the manufacturer.7 Special requirements. even though it may have propagated into the ﬁllet area or the head before separation. ksi Elongation in 5D.5 is required.2 Product Analysis 0. TABLE 1 Mechanical Requirements Property Full-size screws: Tensile or wedge tensile strength.2 The screws that are tested for wedge tensile strength shall utilize a wedge of the angle speciﬁed in Table 6 under the head. 170 135 5. it shall be speciﬁed on the purchase order with the applicable ﬁnish speciﬁcation.2 When protective or decorative coatings are applied to the screws. tellurium. and either Table 4 or Table 5. As a guide for selecting material. Sockets shall be forged or machined at the option of the manufacturer. min Phosphorus. or (3) chemical black oxide.5 Standard Finishes—Unless otherwise speciﬁed. diameter. In the event of controversy over grain size. Additional precautions such as the requirements in Test Method F1940 and Test Methods F606 shall be by agreement with the purchaser.24.2 Screws in sizes through 0. 5.625 in.33 0.31 0. whichever is shorter. 5. Dia. Metallurgical Requirement 8. the screws shall be furnished with one of the following “standard surfaces as manufactured” at the option of the manufacturer: (1) bright uncoated. max Alloying elements Heat Analysis 0. Practices. Screws larger than 1.8 For establishment of a part identifying system.2. 6.500 in. min. molybdenum. min.4 Steel to which bismuth. or ground at the option of the manufacturer. Larger products shall be rolled. 5. (2) thermal black oxide.4 Screws shall be heat treated by quenching in oil from above the transformation temperature and then tempered by reheating to at least 700°F to achieve the mechanical properties speciﬁed in Section 7 and Table 1. nickel.2% offset. 6. shall conform to the requirements prescribed for product analysis in Table 2.1 The screws shall be alloy steel conforming to the chemical composition speciﬁed in Table 2 and the requirements in Speciﬁcation F2282. and with lengths through ten times the nominal product size or 6.6.6 Protective Coatings: 5. See Supplementary Requirement S1 when additional alloy steel grades are required. Hydrogen embrittlement tests shall not be required for screws furnished in these conditions. nominal diameter shall be permitted to be machined. 7. ksi Tensile strength. 5. shall be roll threaded.1 The screws shall be fabricated from alloy steel made to a ﬁne grain practice. min.3 When product analyses are made by the purchaser from ﬁnished screws representing each lot.. 7.6 Supplementary requirements (see S1).1 Carburization or Decarburization : TABLE 2 Chemical Requirements Composition.040 0. thus determined.4. Nom. referee tests on ﬁnished screws conducted in accordance with Test Methods E112 shall prevail. Dia. or vanadium shall be present in sufficient quantity to ensure that the speciﬁed strength properties are met after oil quenching and tempering. min.2 One or more of the following alloying elements: chromium. 6. 5.750 in. and Terminology A751.2. diameter.500 in. Mon Feb 17 12:46:48 EST 2014 2 Downloaded/printed by Universidad Santiago de Chile pursuant to License Agreement. To meet the requirements of the wedge test. For the purpose of this test. 180 140 >0. % Element Carbon. 4.035 0. failure means separation into two pieces.6. unless otherwise speciﬁed by the purchaser.045 39–45 37–45 153 180 10 % 35 % 153 170 10 % 35 % Copyright by ASTM Int'l (all rights reserved). there must be a tensile failure in the body or thread section. #0. 6.040 See 6. Materials and Manufacture 5. unless otherwise speciﬁed by the purchaser. Reduction of area. the chemical composition.A574 − 13 4. shall be cold headed. 6. cut. Nom. except that when speciﬁed by the purchaser the screws shall be hot headed. see ASME B18. min. 8.0 inches. Chemical Composition 6.5 Chemical analyses shall be performed in accordance with Test Methods.. 5. Screws threaded to the head shall pass the requirements for this test if the fracture that caused failure originated in the thread area. and shall meet the mechanical requirements in Table 1. selenium. and for product lengths through 4 in.500 in.1 Socket head cap screws shall be tested in accordance with the mechanical testing requirements speciﬁed in Table 3. 4. No further reproductions authorized. or lead has been intentionally added shall not be permitted. the minimum tempering temperature shall be veriﬁed by subjecting screws to 680°F for 30 minutes at temperature.2.1 When a protective ﬁnish other than as speciﬁed in 5.3 Screws in sizes through 0. ksi Product hardness: Rockwell (HRC) Machined test specimen: Yield strength at 0. max Sulfur. Mechanical Properties 7. .1 When speciﬁed by the purchaser. an alloy steel should be capable of meeting the speciﬁed mechanical requirements if the “as oil quenched” core hardness one diameter from the point is equal to or exceeds 25 HRC + (55 × carbon content). The mean cross section hardness of three readings on the screw before and after retempering shall not differ by more than 2 points hardness Rockwell C (HRC). ksi Proof load (stress). 5. precautions speciﬁed by the coating requirements to minimize internal hydrogen embrittlement shall be exercised. .06D or 0. shall be decisive.. 12.2 Forging cracks originating on the periphery of the head and with a traverse indicating a potential to intersect on the top of the socket head as shown in Fig.25T. Denotes mandatory test.4. 2). 10. D #270.2% Offset . 8. Hardness. 3. ﬁllet. Elongation Strength of Area . XC X XC ... min. as shown in Fig. whichever is greater. The manufacturer or supplier shall afford the purchaser’s representative all reasonable facilities to satisfy him that the material is being Copyright by ASTM Int'l (all rights reserved).1 times the actual key engagement (T) from the bottom of the socket are not permissible..A574 − 13 TABLE 3 Mechanical Testing Requirements Test Conducted Using Full Size Product Proof Load .. or any additional mechanical tests that are required by the purchaser have been met.. to demonstrate that the requirements in 5.... .03D or 0.. whichever is greater.1 Unless otherwise speciﬁed. Dimensions 9. Y YC YC C 1 2 3 4 5 A B All short { Less than lengths 3D A #0.. Finish. 3C) to a depth of 25 % of the basic thread height and on the thread ﬂanks above the pitch diameter. the maximum depth shall be 0. Laps are permissible at the thread crest (Fig. upon reasonable notice. .000 Over 3D >0. and top surfaces do not have a depth exceeding 0.2 The inspection and evaluation of surface discontinuities shall be in accordance with the requirements in Speciﬁcation F788/F788M. .. . .5 in. that concern the manufacture or supply of the material ordered.. . 8. C Either all tests denoted by X or all tests denoted by Y shall be performed. Mon Feb 17 12:46:48 EST 2014 3 Downloaded/printed by Universidad Santiago de Chile pursuant to License Agreement..1 There shall be no evidence of carburization or total decarburization on the surfaces of the heat-treated screws when measured in accordance with Test Method F2328 (Class 3 Product)..3. 10... YC YC YC B . B B B B B B B D denotes nominal diameter of product.2 The depth of partial decarburization shall be limited to the values in Test Method F2328 (Class 3 Product) when measured as described therein.03D or 0. shall be in accordance with Test Methods F606 at room temperature. and Appearance 10. 12. ..... lb Product Length Decarb/ Hardness.. Proof load test denoted Z shall be conducted when purchaser requests the test in inquiry and order.1..1 Forging cracks that connect the socket to the periphery of the head as shown in Fig.000 Over 3D B B B . 12.3 Seams in the shank shall not exceed a depth of 0.03D or 0.2 Forging Cracks: 10. Y YC YC C .2 The purchaser’s representative.000 3D to 1. 10.2.. Discontinuities located elsewhere in the socket shall not have a length exceeding 0..4 Forging cracks located in the socket wall within 0. D >270.3 Other forging cracks are permissible provided those that are located in the bearing area.2 is required by the purchaser.3. .1 If the inspection described in 13. whichever is greater (see Fig. the product shall conform to the requirements of ASME B18.. 10. XC Tensile % Red.1. whichever is greater (see Fig. 13.. C Axial Tensile Strength . denoted X.. 11. 10.064 in..5 in. . 10. Test Methods 12. No further reproductions authorized.2. For peripheral discontinuities.. 13..005 in. #0.1 Testing. when inspected in accordance with Speciﬁcation F788/F788M.. D #270.. .3 Decarburization and carburization tests shall be conducted in accordance with Test Method F2328.2.1.. S1. Inspection 13.. or supplier’s place of business.. Y YC YC C Wedge Tensile Strength .000 Over 3D >0.2.005 in. In case of arbitration full-size tests.5 in. shall have free entry to all parts of the manufacturer’s works. Carburization max min Test Conducted Using Machined Test Specimen Yield Strength at 0..005 in. it shall be speciﬁed in the inquiry and contract or order. Longitudinal seams rolled beneath the root of the thread and across the crests of the threads are acceptable within the limits of 10.. .2.5 in.4 Thread Discontinuities—Threads shall have no laps at the root or on the ﬂanks located below the pitch line.. ZC Z ZC ZC C Item Description Tensile Load.5 in. 1). 1 are not permissible. Workmanship. Section 7. Class 3... or a maximum depth of 0.1 Surface Discontinuities—The surface discontinuities for these products shall conform to Speciﬁcation F788/F788M and the additional limitations speciﬁed herein. 10. D #270. 1 are not permissible. Sampling and Number of Tests 11.1 Guide F1470 shall be used to determine the necessary sampling plan and the number of tests that must be performed to demonstrate that all of the requirements of this standard are met for each lot. 9. 0200 0.750 2.0318 0.9743/ n d g where: As = stress area.462 0.500 0.099 0.138 0. and stress area in accordance with Footnote B. and workmanship requirements. D. 2 A Values based on 180 ksi for 0.3125 0. D = nominal screw size. 15. 0.00394 0.0580 0.190 0. 0.250 0.4375 0.7854 f D 2 s 0.00180 0. .000 3.2 B 0.00830 0.1599 0.93 5.750.500 in. B Stress areas based on H-28 as follows: A s 5 0. dimensional tests.66 11. in.2 B 0. metallurgical requirements.112 0.625 0.164 0. tested and inspected. 0.7854 f D 2 s 0.190 0.500 1.625 – 0. D = nominal screw size.226 0.405 1. All tests and inspections required by the speciﬁcation that are requested by the purchaser’s representative shall be made before shipment.125 1.0878 0. and that they either conform or do not conform to the requirements of this speciﬁcation. incl C TABLE 6 Wedge Test Angles Wedge Angle.763 0. mechanical properties.112 0. 14.000 1.138 0.750 0.08 Proof Load (Length Measurement Method).500.00604 0.00370 0.250 3. the manufacturer or supplier. as applicable.500 in.00487 0.500 and smaller and 170 ksi for sizes larger than 0.A574 − 13 TABLE 4 Tensile Requirements for Coarse Thread Screws Screw Dia (D).1 The disposition of nonconforming lots shall be in accordance with the provisions found in Guide F1470.250 1.099 0.125 0.500 and smaller and 135 ksi for sizes larger than 0.375 0.375 0.1419 0.500 0.0524 0.112 – 0. it shall include the heat number and the results of the chemical composition. lbf C 252 389 552 732 925 160 420 060 800 100 120 300 600 400 600 400 700 500 000 000 000 000 64 56 48 40 40 32 32 24 20 18 16 14 13 11 10 9 8 7 7 6 6 5 41⁄2 41⁄2 4 4 4 4 4 4 4 1 1 1 1 1 1 1 1 2 3 5 9 13 19 25 38 56 78 103 129 165 196 239 323 425 552 680 838 010 210 420 640 880 1 1 1 2 4 7 10 14 19 30 45 62 81 103 131 156 190 256 338 439 540 666 806 958 1 120 1 300 1 500 80 72 64 56 48 44 40 36 32 28 24 24 20 20 18 16 14 12 12 12 12 12 1 1 2 2 5 8 12 16 22 34 50 68 89 116 145 178 213 A Values based on 180 ksi for 0.250 2.00 4. lbf A 324 500 709 941 1 190 1 490 1 830 2 650 3 600 6 500 10 400 15 800 21 400 28 800 43 500 63 400 86 500 113 000 146 000 182 000 224 000 269 000 Stress Area.000 2.10 8. in.0175 0.97 7.00523 0. Body Lengths 2D or Less or Threaded to the Head 6 6 4 Body Lengths Greater than 2D 10 8 6 furnished in accordance with this speciﬁcation.856 1.1187 0.250 1. and stress area in accordance with Footnote B. and stress area in accordance with Footnote B.581 Proof Load (Length Measurement Method) min.500. Responsibility 16.250 0.509 0.90 2.4375 0.1 The party responsible for the fastener shall be the organization that supplies the fastener to the purchaser. min.50 3.875 1.S.060 0. Rejection and Rehearing 14.00661 0.00263 0.3125 0.00796 0.256 0.073 0.500 3.086 0.606 0.500 and smaller and 170 ksi for sizes larger than 0.086 0. B Stress areas based on Handbook H-28 (U.164 0. incl 0. Tensile Load.00278 0.625 0. Department of Commerce) as follows: C Values based on 140 ksi for 0.073 1.663 0. Deg Screw Size. and stress area in accordance with Footnote B.750 3. and n = threads/in.125 0.750 4. Values based on 140 ksi for 0.875 1.01015 0.373 0. incl 0.2 When a test report is speciﬁed. 15.500 2. and n = threads/in. A s 5 0. Copyright by ASTM Int'l (all rights reserved).125 1.875 to 1. min. and shall be conducted so as not to interfere unnecessarily with the operation of the manufacturer’s works or supplier’s place of business.33 9.01474 0.0140 0.00909 0.000 Threads/ in. shall furnish a test report or certiﬁcate of conformance as speciﬁed by the purchaser.969 1.0775 0. Tensile Load. lbf A 473 666 877 090 430 640 520 150 730 440 900 100 500 400 800 500 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 Stress Area.25 4.500 and smaller and 135 ksi for sizes larger than 0.1 When speciﬁed on the Purchase Order.750 0. 16.155 1.375 1.1063 0. Mon Feb 17 12:46:48 EST 2014 4 Downloaded/printed by Universidad Santiago de Chile pursuant to License Agreement.500 in.375 1. in.0364 0. in.334 0.500 in.9743/ n d g 2 where: As = stress area.315 1. 15. No further reproductions authorized. it shall include a statement certifying the fasteners have been manufactured. lbf C 368 518 682 846 110 270 960 450 450 340 800 900 900 500 100 400 800 000 000 000 000 000 000 000 000 000 000 000 000 000 000 TABLE 5 Tensile Requirements for Fine Thread Screws Screw Dia (D).3 When a certiﬁcate of conformance is speciﬁed.000 1.500 Threads/ in.073 0. Certiﬁcation 15. min. in. Mon Feb 17 12:46:48 EST 2014 5 Downloaded/printed by Universidad Santiago de Chile pursuant to License Agreement. No further reproductions authorized. 1 Head and Body Discontinuity Location and Limits FIG. 2 Socket Discontinuity Location and Limits Copyright by ASTM Int'l (all rights reserved). .A574 − 13 FIG. Marking for “Socket Head Cap Screws” shall be on the side of the head or on top.2.1 alloy steel.2 Size.1. 3 Thread Discontinuities 17.1.2.1. cap screws. SUPPLEMENTARY REQUIREMENTS The following Supplementary Requirement shall apply only when speciﬁed by the purchaser in the contract or purchase order.1 Packaging: 18.5 Purchase order number. 18.2. 18.2 When special packaging requirements are required. and comply with governmental regulations where applicable.1 When Supplementary Requirement S1 is speciﬁed on the order.1. socket head 17.1.2 Manufacturer’s or private label distributor’s identiﬁcation shall be distinct. Packaging and Package Marking 18. 18. No further reproductions authorized. Speciﬁc Grade Chemical Compositions S1.A574 − 13 FIG. 18.1.1. Copyright by ASTM Int'l (all rights reserved). .1 All screws with nominal diameters of ⁄ in. NOTE 2—Manufacturing head markings should be unique and traceable directly to the manufacturer. Mon Feb 17 12:46:48 EST 2014 6 Downloaded/printed by Universidad Santiago de Chile pursuant to License Agreement. and larger manufactured to this revision shall be permanently marked to identify the manufacturer’s or private label distributor’s identiﬁcation symbol. 19.2. Keywords 19. the chemical composition shall conform to one of the compositions in Table S1. Product Marking 17. S1. they shall be deﬁned at the time of the inquiry and order.2 Package Marking: 18. 18.1 at the option of the supplier. 14 18. and 18.6 Country of origin. Each shipping unit shall also include or be plainly marked with the following information: 18.2. 18.1 The container shall be marked to permit identiﬁcation of the lot.2.2.1 ASTM designation.1 Unless otherwise speciﬁed.4 Number of pieces. unless a speciﬁc composition (Grade) has been speciﬁed on the purchase order. Supplementary requirements shall in no way negate any requirement of the speciﬁcation itself. product shall be packaged according to the manufacturer’s practice to prevent damage before and during shipment.1.3 Name and brand or trademark of the manufacturer. .45 0.40–0. Mon Feb 17 12:46:48 EST 2014 7 Downloaded/printed by Universidad Santiago de Chile pursuant to License Agreement. and the risk of infringement of such rights..15–0..25 0.5 in.. max: Heat Analysis Product Analysis Sulfur.35–0.04 0.40–0..00 0. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Copyright by ASTM Int'l (all rights reserved). . 2013..040 0.71–1.13–0. 0.37–0.25 0.75–1.37 0.35 0.37–0.40 0.20–0.32 A 5137M . 2012..71–1.35 0.83 0.80–1..40 0.93 0.35 0. 0. 0. and <270.37 1.20–0.42 0.67–0. (Approved April 1.80 0. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard..) (1) Revised Table 3 to include product less than or equal to 270. .05 0.040 0.0005–0.15 0.42 0. United States. or through the ASTM website (www. are entirely their own responsibility.13–0.70 0..33–0.13–0.36–0. PA 19428-2959.30 0....40 0.48 0.00 1.04 0.43–0.43 0.15–0.33–0.15–0.10 0.75–1.33–0.. 0.85–1.60–0..040 0. .040 0.040 0.040 0.045 0.04 0.org (e-mail).040 0. 0.50 0.75–1.45 0. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ﬁve years and if not revised.045 0.71–1.37 A .040 0. Committee F16 has identiﬁed the location of selected changes to this standard since the last issue (A574 – 11 that may impact the use of this standard.20 0.) (1) Revised Table 3 to include mechanical test requirements for nominal diameters over 0. A .63 0.38–0. .95–1.035 0.42 0. for item 4.040 0.15–0.045 0.org/ COPYRIGHT/).13–0.75–1.040 0..045 0.15–0.65–2.040 0.60 0.. This standard is copyrighted by ASTM International.035 0.30–0.035 0.35 0.27–0.040 0.035 0.astm.75–1.15–0.A574 − 13 TABLE S1.47 0.50 0.15 0.13–0..75–1... 0. (Approved April 1. Users of this standard are expressly advised that determination of the validity of any such patent rights. which you may attend.90–1.. 0..18–0.10 0. Elements shown with an “A” are not applicable to that grade designation.000 lb.045 0.37 A 4142 G41420 0.38–0. PO Box C700.13–0.40–0. max: Heat Analysis Product Analysis Silicon: Heat Analysis Product Analysis Nickel: Heat Analysis Product Analysis Chromium: Heat Analysis Product Analysis Molybdenum: Heat Analysis Product Analysis Boron: Heat Analysis Product Analysis A B 4137 G41370 0.73 0.035 0.00 0.93 0..15–0.13–0.27–0..27 A . Permission rights to photocopy the standard may also be secured from the ASTM website (www.35–0.15–0.38–0. either reapproved or withdrawn.003 B .80–1.15–0.35 0.org).27 A . .. Your comments will receive careful consideration at a meeting of the responsible technical committee.. or [email protected] 0. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards.37 A 4145 G41450 0. No further reproductions authorized.65–2.30 0. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585 (phone). Boron is not subject to product analysis.10 0.90 0.53 0.32 A 8740 G87400 0.25 0.70–0.37 A 51B37M .13–0.045 0.80–1.43 0.035 0.90 0.53 0.045 0.1 Chemical Composition Grade Designation UNS Number Carbon: Heat Analysis Product Analysis Manganese: Heat Analysis Product Analysis Phosphorus..70–0.27 A .57–0.37 A 4340 G43400 0. West Conshohocken.41–0.30–0.15–0..000 lb minimum tensile load.25 0.50 0.040 0. SUMMARY OF CHANGES Committee F16 has identiﬁed the location of selected changes to this standard since the last issue (A574 – 12 that may impact the use of this standard.25 A .67–0.90–1.31–0.35 0.13–0.035 0.. 610-832-9555 (fax). 0..040 0. 100 Barr Harbor Drive.18–0.35 0.13–0. at the address shown below.30 A .astm.45 0..00 0.36–0.

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