IS 4454 ( Part 2 ) :2001 [ Superseding IS 4454 ( Part 3) : 1975] *~~?#q qTqqj mtihimmwtf+~-fwia 3TPT2 aFf Ti3mTi?=rf@l$wmixR Indian Standard STEEL WIRE FOR MECHANICAL SPRINGS — SPECIFICATION PART 2 OIL HARDENED AND TEMPERED STEEL WIRE (Second Revision ) ICS 21.160; 77.140.25 0 BIS 2001 BUREAU MANAK OF INDIAN STANDARDS SHAH ZAFAR MARG BHAVAN, 9 BAHADUR NEW DELHI 110002 February 2001 Price Group 5 . An informative Annex A has been given for the benefit of purchaser giving particulars to be specified by the purchaser while placing order for the spring wires covered in this standard. the Committee decided to revise it to br]ng it in line with the present practices being followed by the Indian industry. IS 4454 ( Part 3 ) : 1975 shall stand superseded. Other parts in the series arc : Part 1 Cold drawn unalloyed steel wire Part 4 Stainless steel wire Examples of application for oil hardened and tempered steel wire ha~c been given in Annex B in the preparation of this standard. expressing the result of a test or analysis. MTD 4 FOREWORD This Indian Standard ( Part 2 ) ( Second Revision ) was adopted by the Bureau of Indian Standards. The number of significant places retained in thc rounded off la 1uc should be the same as that of the specified value in this standard. torsion test and decarburization test have been modified d) e) Subsequent to publication of this standard. the final taluc. after the draft finalized by the Wrought Steel Products Sectional Committee had been approved by the Metallurgical Engineering Division Council. Wllilcre\ic\vil~gt l~estillldtirdill [he light of experience gained during these years. This part is one of the series of Indian Standards on steel wire for mechanical springs. . necessary assistance has been derived from: a) lSO/CD 8458-1 : 1998 ‘Steel wire for mechanical springs — Part 1 : General requirements’ lSO/CD 8458-3 : 1998 ‘Steel wire for mechanical springs — Part 3: Oil hardened and tempered steel wire” prEN 10270-2 : 1996 ‘Steel wire for mechanical springs — Part 2: Oil hardened and tempered spring steel wire of unalloyed steels” b) c) For [hc purpose of deciding whether a particular requirement of this standard is complied with. This standard wasfirs tpnblishe din1967 andsubsequently revisedin 1975. Grade designation has been modified. The properties governing the application of steels for springs maybe considerably influenced by their chemical composition as well as the modes of mechanical treatment and heat treatment applied.. 10 this re~ision fol[o~~ing changes ha~e been made: a) I Requirements of IS 4454 ( Part 3 ) : 1975 ‘Oil hardened and tempered steel wires-alloyed’ have been rnergcd in line with other overseas standards.Wrought Steel Products Sectional Cornmittec. obscncd or calculated. b) c) Chemical composition and tensile strength values have been modified Dimensional tolerances ha~’ebeen modified Requirements of wrapping test. the steels are classified into three categories.wd )’. [t is for these reasons that a very large variety of steels may be employed in the manufacture of steel springs. This variety is further increased owing 10 the fact that in certain cases these springs have to exhibit considerable resistance against corrosive influences and withstand elevated temperature and that the mechanical stress is imposed on them vav considerably. In order to facilitate clear survey. shall be rounded off in accordance \vlth 1S 2: 1960 ‘Rules for rounding off numerical vallles ( revi. constitute provisions of this standard. Pitch The way in which a single ring of wire behaves when cut from coil. or a combination of both. 5 GRADES The grade of spring wire used depends on the stress 1 3 TERMINOLOGY 3. NOTE — This does not apply to situations of low frequency high stresses. 228 (in Parts ) 1608:1995 1717:1985 1755:1983 Title given in IS 1956 (Part 5 ) and the following shall apply.5 Dynamic Duty 1956 GlossaIYof terms relating to iron and (Part5 ): 1976 steel: Part 5 Bright steel bar and steel wire (first revision ) 4163:1982 Method for determination of inclusion content in steel by microscopic method (Jkst revision) Methods for random sampling Method of measuring decarburized depth of steel (jhxt revision ) General technical delivery requirements for steel and steel products Qualifies applications where springs are subjected to frequent or predominantly dynamic loading and where small coiling ratios or severebending radius is required.3 Oil-Hardened and Tempered Wire Wires that are heat treated in the following way: they are first transformed into austenite. and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below: 1S No. NOTES 1 Well-castwire willlieflaton itselfin uniformcircles. Spiral cast denotes the tendency of the rings out from the coil in spirals. which through reference in this text. At the time of publication. that is. Method for chemical analysis of steel Mechanical testing of metals — Tensile testing (second revision ) Method for simple torsion test for wire ( second revision ) Method for wrapping test for metallic wire (@t revision ) 3. All standards are subject to revision. 4905:1968 6396:1983 8910:1978 4 SUPPLY OF MATERIAL General requirements relating to the supply of material shall be as laid downinIS8910. 3. NOTE — A ring of wire does not imply any specific length of wire or diameter of wire. the definitions . spool-less core and cheese are synonymous with coil.6 Ring One turn of wire from a coil. quenched in oil or other suitable medium and then tempered at an appropriate temperature. one complete circle of wire. for the manufacture of mechanical springs for static duty and dynamic duty applications.IS 4454( Part 2 ): 2001 Indian Standard STEEL WIRE FOR MECHANICAL SPRINGS — SPECIFICATION PART 2 OIL HARDENED AND TEMPERED STEEL WIRE (Second Revision ) 1 SCOPE This standard ( Part 2 ) covers requirements for oil hardened and tempered carbon and low alloy steel wire.2 Cast. Straight cast wire runs out approximately straight when unwound from the coil. Helix. 3.4 Static Duty Qualifies applications where springs me subjected to static stresses or infrequent dynamic loading.1 For the purpose of this standard. 2 The terms spool. 3. the editions indicated were valid. 2 REFERENCES The following Indian Standards contain provisions. 3. 025 0.15-0.20-1. mm Static (2) Medium (3) Fatigue High Fatigue (4) FDC FDCrV(~B) FDSiCr TDC TDCrV(~B) TDSiCr VDc VDCrV(~B) VDSiCr 0.88 0. Table 1 Wire Grades and Diameter Range ( Clause 5 ) Tensile Strength (1) Low tensile strength Medium tensile strength High tensile strength Diameter range.35 0.030 0.20 0.025 0.12 0.40 0. The steel shall be fully killed.50-1.10-0.50-0.12 0.60-0.60 0.10-0.3 The wire shall be oil-hardened and tempered after cold working.025 0.12 0.2 The VD grades shall be checked for maximum size of inclusion in accordance with IS 4163. In case of dispute.20 0.72 0.53-0.10-0.1 and7.50-10. 7.20 0.40-0.025 — — — 0.10-0. 6 ~ACI’URE 6.35 0.00 0.40-0.20 s Max (5) P Max (6) Cr (7) v (8) — Cu Max (9) VDc FDCrV-A TDCrV-A VDCrV-A FDCrV-B TDCrV-B VDCrV-B FDSiCr TDSiCr VDSiCr 0.IS 4454( Part 2 ): 2001 level and on the nature of duty.50-10. 6.12 0.50-0.50-0.00 Table 2 Chemical Composition ( Clauses 7.60 1.10-0.88 0.60-1.15-0.00 0.025 0.025 0.50-0.025 0.20-1.80-1.10-0.1 Ladle analysis of the material when carried out either by the method specified in the relevant part of IS 228 or any other established instrumental/chemical methc@ shall be as given in Table 2.62-0.10-0.60 — — 0.00 0.75 (3) (4) 0.90 0.50-0.25 0.50-0.60-1.10 0.025 0.15-0.25 0.40 0.10 0.50-0.030 0.10 0. — — 0.s0 0.10-0.90 0. 6.20 0.47-0.20-1. 7 CHEIWICALCOMPOSITION 7.025 0.72 0.20 0.80-1.60 0.47-0.50-0.47-0.72 0.62-0.10-0.25 0.025 0.60 0.2 Product Analysis Permissible variations in case of product analysis from the limits speciiled in Table 2 shall be as given in Table 3.90 0.60 0.030 0.The wire diameterrangea and tensile strength grades normally available for static duty and dynamic duty are given in Table 1.025 0.40 0. if he so desires.60 1.030 0.025 0.12 0.030 0.60 0.30 0.90 0. Percent Mn (1) FDC TDC (2) 0.10-0.10-0.20 0.55 0.30 1.12 0.1 The processes used in making the steel and in manufacturing oil-hardened and tempered spring steel wire are left to the discretion of the manufacturer.53-0.20 0.62-0.50-1. the procedure given in the relevant part of IS 228 shall be the referee method. The allowable level of inclusions shall be agreed between the manufacturer and the purchaser.50-0.90 0.50-17.80-1.20 0.50-0.80 2 .90 0.12 0.025 0. where the method is not given in IS 228 or its relevant parts.55 0.25 0.35 0. However.025 0. the referee method shall be as agreed to between the purchaser and the manufacturer.025 0.025 0.030 0.55 0.50-0. The secondary steel making process adopted shall be mutually agreed to between the manufacturer and the purchaser.40-0.10-0.12 0.30 0.50-0.60-1.25 .60 0.25 0.030 0.80 0.2 ) Grade Constituent.50-1. The customer should be informed of the manufacturing process.030 0. 37 0.100 1 Class A tolerance is intended for wire grades TD and VD. 10 MECHANICAL PROPERTIES 10.01 NOTES 0.020 — — — — 0.2 The differenm between the maximum and minimum diameter of the wire at the same cross-section shall not be more than 50 percent of the total permissible Table 4 Diameter Tolerance for Coiled Wire ( Clauses 9.02 0.50 18.10 14.17 0.070 0.10 14.090 0. The tensile strength and reduction in area of the wire shall be as given in Tables 5 and 6 and shall be calculated using the actual wire diameter.00 5.10 9.30 20.80 1.080 0.030 0.65 0.3 ) Nominal Diameter of Wire.00 0.025 1.78 4.090 0.9. such as grooves.050 0.005 0. mm Nominal Diameter of Wire. tears.2 and9.05 0.09 0. 9 IMMENS1ONS AND TOLERANCES 9.005 0.45 7.045 0.05 0.3 Sizes and tolerance other than those specified in Table 4 may be mutually agreed to between the purchaser and the manufacturer.015 0.040 0.50 18.010 0.00 11.080 0. mm Class A Over (1) Up to and Including (2) Class B Over Up to and Including (2) Class A Class B (3) (4) (1) (3) (4) — 0. L 1 The range of tensile strength values within a coil shall not exceed 50 MPa for the grades VII. seams.02 8 FREEDOM FROM DEFECTS The surface of the wire shall be smooth and as free as possible from defects.1 Tensile Test The tensile test shall be carried out in accordance with IS 1608.78 2.05 0.26 0.004 0. and other harmful defeets. deviation specified in Table 4. Percent.00 11.020 0. on visual examination. 9. mm Tolerance (+).025 0.17 0.015 0. Max (1) Carbon Silicon Manganese Sulphur Phosphorus Copper Chromium Vanadium (2) All SiCr Other grades All All All AH All All (3) 0.012 0.00 0. die-marks.00 2.65 0.006 0. scratches. 3 . 2 Class B tolerance is intended for wire grade FD.070 0. mm Tolerance (+).035 0.040 0.05 0.1.035 0.45 7.100 0.030 0.09 0.2) Constituent Wire Grade Permissible Variations Over and Under the Specified Limit.030 0.045 10.00 5.010 0.04 O. which have a noticeable adverse effect on the application of the wire.050 0. pits.03 0. Class A tolerance is intended for wire grades TD and VI).003 0.80 1.37 0. 9.008 0.003 0.26 0.10 9.78 0. rus~ scale.01 1.03 0. Class B tolerance is intended for wire grade FD.78 4.IS 4454( Part 2 ): 2001 Table 3 Permissible Variations for Product Anatysis ( Clause 7.qos 0. 10. 60 MPa for TD and 70 MPa for the grades FD.1 Tolerance on diameter of wire shall be as specitied in Table 4.30 10. -— MPa FDC Over (1) — Up to and Including (2) 0.50 10.00 12. 4 For grade FDCrV-B: For diameter <1.50 7.20 4. 5 For grade FDSiCr: For diameter s2.20 3.50 4.20 3.00 2. a tensile strength range of 1 720-1 92~ MPa may be agreed.00 mm.1020 kgt7mm2 = 2 For grade FDC: For diameter s 1.00 mm. a tensile strength range of 1 620-1 820 MPa may be agreed.80 1. a lower value of 1900 MPa may be agreed.70 5. a lower value of 2060 MPa may be agreed. .60 2.70 5.00 2.00 15.50 0.00 14.50 4.00 1.IS 4454( Part 2 ) :2001 Table 5 Mechanical Properties for Oil Hardened and Tempered Steel Wire for Static Duty ( Clause 10.00 17. a tensile strength range of 1 720-1 920 MPa may be agreed.00 mm.80 1.50 4.60 6.00 8.00 15.00 mm.00 8.00 mm.00 12.00 FDCrV-A FDCrV-B FDSiCr Keduction in Area Percent.50 10.60 2.00 8.50 2. 6 Dispersion of tensile strength of one wire shall fall within half of the range of tensile strength in the table 4 .00 4. For diameter S2 .70 3. — Min (3) 1 800-2 100 1 800-2100 1 800-2060 1 800-2010 1 750-1950 1 740-1 890 1720-1 890 (4) 1 800-2 100 1 800-2 100 1 780-2080 1 750-2010 1 750-1 990 1 710-1950 1 710-1 890 1670-1 1660-1 1630-1 830 820 780 (5) 1900-2200 1 900-2200 1 860-2 160 1 850-2100 1 840-2070 1 820-2030 1790-1 970 (6) 2000-2250 2000-2250 2000-2250 2000-2250 2000-2250 2000-2250 2000-2250 1970-2 140 — — 45 45 45 45 45 45 45 40 40 40 40 40 40 40 35 35 35 35 35 30 30 30 30 (7) 0.00 3.00 NOTES 1 1 670-1 820 1 640-1 790 1 620-1 770 1 600-1 750 1 580-1730 1 550-1700 1 540-1690 1 520-1 670 I 510-1 660 1 500-1 650 1 470-1 620 1460-1 1440-1 1430-1 1400-1 1380-1 610 590 580 550 530 1 750-1 900 1720-1 870 1950-2120 1930-2100 1910-2080 1 900-2060 1 870-2030 1 860-2020 1 850-2000 1 840-1 990 1 830-1 980 1 800-1 950 1780-1 1760-1 930 910 I 700-1 850 1680-1 830 1 610-1 760 1 600-1750 1 560-1 710 1 540-1690 1 520-1 670 1 510-1660 1 500-1 650 1460-1 1440-1 1420-1 1400-1 610 590 570 550 1 660-1 810 1 620-1 770 1610-1760 1 590-1 740 1 580-1 730 1 560-1 710 1 540-1 690 1 520-1 670 1 510-1 660 1 500-1 650 1480-1630 1470-1620 1450-1600 1430-1 1420-1 1410-1 1400-1 580 570 560 550 1 740-1 890 1 710-1 860 1700-1 850 1380-1530 1370-1520 1350-1 500 1 360-1 510 1 320-1470 1 280-1430 1 270-1420 1250-1400 1 660-1 810 1620-1770 1 580-1 730 1470-1 720 1320-1470 1300-1450 1290-1440 1270-1420 1 550-1 700 1 MPa = 1 N/mm2= 1 MN/m2 0.00 8.00 4.60 6.00 6.00 mm.50 7.40 1.50 4.30 1.1) Wire Diameter mm (Nominal). For diameter <3.70 3. 3 For grade FDCrV-A: For diameter <3.00 5.50 2. a lower value of 2000 MPa may be agreed.00 6.50 0.30 1.00 5.00 3.00 1. Tensile Strength for Grades.20 4.40 1.00 14. MPa Reduction in Area Percent.00 5.80 1. 10.1 The torsion test shall be applied to wires with nominal diameter from 0.20 3. 10.00 mm. Other gauge lengths may also be used subjeet to mutual agreement between the manufacturer and the purchaser. Over (1) — Up to and Including (2) TDC VDc (3) 1700-2000 1700-2000 1700-1 950 TDCrV-A VDCrV-A (4) 1750-1950 1750-1950 1750-1950 1700-1900 1670-1 1670-1 1620-1 860 860 800 TDCrV-B VDCrV-B (5) 1910-2060 1910-2060 1910-2060 1 860-2010 1 820-1970 1 820-1 970 1770-1 1720-1 920 860 TDSiCr VDSiCr (6) 2030-2230 2030-2230 2030-2230 2030-2230 2030-2230 2030-2210 2000-2160 1900-2060 1 860-2010 1 860-2010 1 860-2010 1 860-2010 1 810-1960 1 810-1 960 1 810-1 960 1 760-1 910 1760-1 1750-1 910 910 Min (7) — — — 45 45 45 45 45 45 45 45 45 45 45 45 45 45 0.00 6. The fractoreplane shall be perpendicular 5 .70 3.00 8.00 4.3.50 0.30 1. (d= nominal diameter ofthe whe).00 0. 10.50 4.60 2.50 4.50 4.50 4. 10.00 3.00 3.00 5.00 2.40 1.00 8.IS 4454( Part 2 ): 2001 Table 6 Mechanical Properties for Oil Hardened and Tempered Steel Wire for Dynamic Duty ( Clause 10.d defects shall be present on surface after fracture.00 1.50 0.30 1.50 2. the torsion test piece shall be twisted in one direction until fracture.00 2. The wire shall not show any sign of fracture when closely coiled for four turns around a mandrel of diameter equal to that of the wire.00 9.60 2.2 Wrapping Test Wrappingtest shall be applied to wires with nominal diameter less than 0.00 4.20 4.50 7.00 9.70 3. Tensile Strength for Grades.2 The torsion test shall be carried out in accordance with IS 1717.70 5.3 No harmfi.20 4.3.00 NOTES 1700-1850 1700-1850 1 700-1 850 1720-1 800 1 670-1750 1 640-1750 1620-1750 1600-1720 1 580-1700 1 550-1650 1 540-1 650 1 520-1650 1 510-1640 1 500-1 640 1470-1620 1460-1620 1440-1 1430-1 1400-1 570 570 520 1620-1770 1 620-1770 1620-1770 1 570-1 720 1 570-1720 1 520-1 670 1 520-1670 1 520-1 670 1470-1620 1470-1620 1470-1620 1470-1620 1420-1 1420-1 570 570 1 660-1 810 1 660-1 810 1620-1770 1 620-1770 1 570-1720 1 520-1 670 1 520-1 670 1 520-1 670 1 520-1670 1470-1620 1470-1620 1420-1 1420-1 570 570 40 40 40 40 40 35 35 1 710-1 860 1710-1 1660-1 1660-1 860 810 810 1 370-1 520 1370-1 1370-1 520 520 1 370-1 520 1 340-1490 1 340-1490 1 380-1490 1360-1490 1 620-1770 1620-1 770 1 1 MPa = 1 N/mmz = 1 MN/mz = 0. 2 Dispersion of tensile strength of one wire shall fall within half of the range of tensile strength in the table. For wire grades TD and VD.3.20 3. the test piece is first twisted in one direction — the number of twists indicated in Table 7 and is then twisted in the other direction until fixture.00 10.3 Torsion Test 10. For grade FD wire.50 7.80 1.07 mm.1) Wire Diameter mm (Nominal).70 mm up to and including 6.70 5.60 6.50 2.60 6.00 6.40 1. Wrapping test shall be carriedout in accordance with IS 1755.1020 kgflmm’. The gauge length is equivalent to 100 x d .00 1. 6 Cast of the Wire The wire shall be uniformly cast.00 1.00 mm diameter. three to three and half times the nominal diameter.IS 4454 (Part 2) :2001 Table 7 Torsion Test ‘Requirements ( Clause 10.00 to wire axis and shows no visible cracks. VDSiCr Right (7) Left (8) 6 6 6 6 6 6 24 16 14 12 10 8 6 6 6 6 6 6 12 8 4 4 4 4 6 5 4 4 4 4 0 0 0 0 0 0 0 0 1. for sizes up to 5 mm. 10.60 2.4 Bend Test The bend test shall be applied to wires with nominal diameter greater than 6.60 6. 10. the cast requirements may be considered as being fulfilled if the following condition is satisfied: An individual ring taken from the coil or bobbin and freely hung on a hook may show an axial displacement ‘j’ at the ends of the ring ( see Fig.50 5.60 2.1 By mutual agreement between the manut%turer and the purchaser.00 3. When a ring of wire is cut from the package and allowed to Ml on the surfhce.6. it sets to approximately the times its original length.69 Up to and Including (2) 1.3. The surface condition of the wire and the regularity of the spring pitch (and individual windings) shall be inspected with the test piece in this condition. The wires shall not show any sign of fracture when bent through an angle of 90° around a mandrel of diameter equal to twice the wire diameter. The closed coil is then stretched so that after releasing the stress.50 3. and nominal diameter of the wire in mm.00 3.50 4.60 . A test piece approximately 500 nun in length is closelywound under slight but reasonably uniform tension on a mandrel. mm Minimum Number of ‘lkists for Grades TDC. VDC Over (1) 0. 10.00 1.70 nunwithmutoalagmemertt between the manufacturer and the purchaser. 10.50 3. 1 ).50 6 6 6 4 6 6 4 4 3 3 5.50 4. This displacement ‘f shall not exceed a value given by the following inequality: where D= mean diameter of the individual ring measured when lying horizontal in mm. 1 CAST OFTHEWIRE 6 . the wire shall lie flat and not show a spiral cast.5 Coiling and Stretching Test The coiling test may be applied to wires with nominal diameternot greater thanO.2) Nominal Diameter of Wire. Right (3) Left (4) TDCrY VDCrV r Right (5) Left (6) TDSiCr. d= FIG. 02 1. The permissible maximum radial depths of partial decarburized layer are shown in Table 9. when examined microscopicrdly. Unless specified otherwise.25’+’.7 Deep Etch Test Deep etch test shall normally be limited to wire of 1.8 Eddy Current Test Eddy current testing may be carried out for VD grades wires of diameter from 2. they shall be free from seams or other defects likely to prejudice the performance of the finished springs. 7 .9 Decarburization Test Decarburization test shall be carried out in accordance with IS 6396.00 mm. 10.1 The wire is supplied in coils. Table 9 Permissible Depth of Surface Decarburization ( Clause 10.1) Nominal Diameter of Wire.50 2. the method of drawing representative samples of the material and the criteria for conformity shall be as prescribed in Annex C.d’) 1)d is the nominal diameter Of wire.0 mm diameter and above. If the testis required by the purchaser on smaller sizes of wire.0?4.7.1) Nominal Diameter Permissible Depth of Surface in mm Defects of Wire.05 1.01 0. The permissible depth of surface defects after the test shall be in accordance with Table 8.025 mm of diameter.00 Up to and Including (2) 4. Decarburization mm FD (5) 1. mm Up to and Including (2) WI (3) for Wire Grades From (1) TD (4) FD (5) 0.5’%0 d’) From (1) 4. 13 CONDITION OF DELIVERY 13. 10.1 The test pieces shall be immersed in a solution of 50 percent of concentrated hydrochloric acid and 50 percent of water at a temperature in the range of 70-800C for a period of time equivalent to 2s for every 0.2 It is necessa~ to heat the test pieces to a temperature of about 5000C for the purpose of stress relief before carrying out this test.04 1.00 2. The method of testing and the evaluation of test results are to be agreed upon between the purchaser and the manufacturer.9.7.5% dl) 1.4~o dl) 1)d is the nominal diameter Of wire.IS 4454( Part 2 ): 2001 10.00 6. or on spools.015 0. ’) d TD (4) 0. 10.9.8%di) 1.00 6. the wire may have an oiled surface for all surface finishes.1 The cross-section of wire of VD and TD grades shall be free from complete decarburization.5%d]) o.0%d’) 1. The wire in coils or on spools shall form one continuous Table 8 Permissible Depth of Surface Defects ( Clause 10.7.00 10. 12 SAMPLING Unless otherwise agreed to. mm Permissible Depth of Surface for Wire Grades.0% dl) 0. 10.00 VD (3) 0. this shall be agreed upon at the time of enquiry and order. 10.50 mm to 8.7Vo dl) 0. 11SURFACE FINISH The spring wire shall be protected against corrosion and mechanical damage.00 0. with a maximum of 5 mi~ atter which. if mutually agreed between the manufacturer and the purchaser. The coiled wire shall not have welds. Wire diameter. ANNEX ( Foreword) B EXAMPLES OF APPLICATION OF OIL HARDENED AND TEMPERED STEEL WIRE B-1 FIELD OF APPLICATION As a rule unalloyed steels are used for applications atroomtemperature whereasalloyedsteelsaregenerally used at a temperatureaboveroomtemperature.1. Cast or batch number. The details of conditions under which the licence for the use of the Standard Mark maybe granted to manufacturers or produc%rsmaybe obtained from the Bureau of Indian Standards. Any special requirement.The suitable mode of packing shall be mutually agreed to between the purchaser and the manufacturer.1. c) VD grade is intended for use under severe dynamic duty such as for valve springs. Tests required.the purchasershall s@@ the following: a) b) The desired quantity.Alloyed steels may also be chosen for above average tensile strengths. 15. 13.2 Unless otherwise specified by the purchaser. and Test report. The wires shall not be kinked and wavy. 1986 and the Rules and Regulations made thereunder. c) d) e) f) /3) h) Nominal wire diameteq Surface finish and coating where relevant. . required for normal springs.1 Each coil of wire shall be legibly marked with the following information: a) Name of the supplier. such as required for clutch springs. 15 MARKING 15. The wire grade. b) TD grade is intended for medium fatigue levels. Weight of the coilllmndle.2 The use of the Standard Mark is governed by the provisions of the Bureau ofIndian Standards Act.1 The material may also be marked with the StandardMark. and Date of supply. the wire shall be supplied in slightly oiled condition 14 PACKING The packing of the material shall be done in such a way that corrosion does not attackthe material during transit. ‘ 15. ANNEX ( Foreword) A INFORMATION TO BE GIVEN BY THE PURCHASER A-1 BASIS FOR ORDER While placing order for spring steel wires covered by this standard. b) c) d) e) f) Wire grade.IS 4454( Part 2 ): 2001 length originating from one heat only. a) FD grade is intended for static applications. The form and condition of delivery. 2 are satisfied. If the number of defective found is less than or equal to the permissible number of defective specified in CO1 of Table 10. These samples shall be tested for all the chemical requirements.1 Tests for Physical Requirements From the coils selected from CO1 and 2 of Table 10. A test piece failing to meet anyone of the requirements. of Coils in the Lot No.IS 4454( Part 2 ): 2001 ANNEX ( Clause C 12) SAMPLING AND CRITERIA FOR CONFORMITY C-1 LOT In any consignment. it shall be called a defective.2) No.1 and C-3. of Tests for Chemical Requirements (4) (1) Up to 25 26 to 50 51 to 150 151 to 300 301 and above 2 3 5 8 13 o 0 0 1 1 1 1 2 2 2 . namely. C-1. C-2 SAMPLING The number of coils to be taken from a lot shall be according to CO1 and 2 of Table 10.1 and C-3. 1 adequate length of test piece shall be cut from each end and subjected to physical tests. The lot shall be considered to have conformed to the chemical requirements ifall the individual test pieces tested for chemical requirements pass the test. These samples 1 shallbetaken at randombyusing random number tables (see IS 4905). of Coils for Physical Requirements (2) Permissible Number of Defective(s) (3) No. C-3. size. the following procedure shall be followed for chemical requirements: From these test pieces which have conformed to physical requirements tither test pieces shall be selected at random according to col 4 of Table 10. If a test piece fails to meet the respective chemical requirement. C-4 CRITERIAFORCONFORMITY A lot shall be considered to have conformed to the requirements of the specification if C-3.l Sample shall be taken from each lot and tested for conformity to the standard. wrapping and coating tests. Table 10 Scale of Sampling and Permissible Number of Defective ( Clauses C-2. surface condition. the lot shall be considered to have 3 conformed to physical requirements. C-3 PREPARATION OF SAMPLES AND NUMBER OF TESTS C-3. C-3. shall be called a defective. bend.2 Tests for Chemical Requirements Unless otherwise agreed. all the coils of wire of the same grade and diameter manufactured under essentially similar conditions of manufacture shall be grouped together to constitute a lot. tensile. PATNA. Andheri (East) MUMBAI 400093 Branches: Telegrams: Manaksanstha ( Common to all ofilces ) Telephone 3237617 { 3233841 3378499. THIRUVANANTHAPURAM. CHENNAI 600113 Western: Manakalaya. 9 Bahadur Shah ZafarMarg. I. Road. No part of these publications maybe reproducedin any form without the prior permission in writing of BIS. Amendments Issued Since Publication Amend No. RAJKOT. NAGPUR. JAIPUR. if the review indicates that changes are needed. Sector 34-A.3379120 603843 { 602025 2350216. in the course of implementing the standard. 1986 to promote harmonious development of the activities of standardization. HYDERABAD. a standard along with amendments is reaftlrmed when such neview indicates that no changes are needed. GHAZIABAD.3239402 Regional Offices: Central: Manak Bhavan. BANGALORE. Scheme VIIM.3233375. BHOPAL. marking and quality certification of goods and attending to connected matters in the country. E9 MIDC. Khurj~ India . type or grade designations. V. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comrqents. BHUBANESHWAR. LUCKNOW. Standards are also reviewed periodically. 9 Bahadur Shah Zafar Marg NEWDELHI 110002 Eastqrn: 1/14 C. of necessary details. This does not preclude the free use. it is taken up for revision. Date of Issue Text Affected BUREAU OF INDIAN STANDARDS Headquarters: ManakBhavan.2352315 8329295. such as symbols and sizes. Users of Indian Standards should ascertain that they are in possession and ‘Standards: of the latest amendments Additions’. Printed at New India Printing Press. Enquiries relating to copyright be addressed to the Director (Publications). T. I. I. FARIDABAD. CHANDIGARH 160022 Southern: C. GUWAHATI. New Delhi 110002 Telephones: 3230131. BIS.Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Zndian Standards Act. lvfTD 4 ( 4068). Kankurgachi CALCUTTA700 054 Northern: SCO 335-336. PUNE.3378561 { 3378626.2350442 { 2351519. Copyright BIS has the copyright of all its publications.8327858 { 8327891. P.8327892 AHMADABAD. T. COIMBATORE. KANPUR. 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