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Indian Standard SCHEDULES FOR WROUGHT STEELS PART 6 CARBON AND ALLOY TOOL STEELS ( First Revision ) ICS 77.140.20; 25.100 0 BIS 1996 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 bxxrnhcr I996 Price Group 2
Alloy Steels and Special Steels Sectional Committee, MTD 16 FOREWORD This Indian Standard (Part 6) (First Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by the Alloy Steels and Special Steels Sectional Committee had been approved by the Metallurgical Engineering Division Council. This standard was first published in 1961. On the basis of the experience gained in the production and use of steels, the Sectional Committee has decided to revise the standard and issue it in parts. The other parts are: Part 1 Part 21 Set 1 Part 21 Set 2 Part 3 Part 4 Part 5 Part 7 Steels specified by tensile and/or yield properties (first revision) Carbon steels (unalloyed steels), Wrought products (other than wire) with specified chemical composition (first revision) Carbon steels (unalloyed steels), Carbon steel wires with related properties Cfirst revision) Carbon and carbon manganese free cutting steels @st revisinn) and related properties Alloy steels (alloy constructional and spring steels) with specified chemical composition and mechanical properties (first revision) Stainless, and heat resisting steels (second revision) Steels for elevated temperature service (creep resistant steels) In this revision, the following modifications have been made: 21 1 Steel designations have been modified in accordance with IS 1762 (Part I) : 1974 Code for designation of steels: Part 1 Based on letter symbols (first revision). b) Tool steels are divided into four categories: 1) Unalloyed cold worked tool steels 2) Alloyed cold woik tool steels 3) Alloyed hot work tool steels 4) High speed steels In the preparation of this revised standard, assistance has been derived from the following Overseas standards: IS0 DIS 49.571980 Tool steels, issued by International Organization for Standardization, ISO. DIN 17350 1980 Tool steels, issued by Deutsches lnstitut Fur Normung, DIN. ASTM A6001989 Tool steels high speed, issued by American Society for Testing and Materials, ASTM. ASTM A6811991 Tool steels alloys, issued by American Society for Testing and Materials, ASTM. ASTM A6X61989 Tool steels carbon, issued by American Society for Testing and Materials, ASTM. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test, shall be rounded off in accordance with IS 2 : 1960 Rules for rounding off numerical values (revised). The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.
IS 1570 ( Part 6 ) : 1996 Indian Standard SCHEDULES FOR WROUGHT STEELS PART 6 CARBON AND ALLOY TOOL STEELS ( First Revision ) 1 SiOPE 1.1 This standard is applicable to carbon and alloy tool steels supplied to a specified composition as given in Tables 1, 2, 3 and 4. 1.2 This schedule is not intended to be used as specification to which steel will be ordered. The orders shall be placed to the relevant detailed specifications. 2 GRADES The tool steelsare divided into four broad categories, namely: Unalloyed Cold Work Tool Steels, TC (Table 1) Alloyed Cold Work Tool Steels, TAC (Table 2) Alloyed Hot Work Tool Steels, TAH (Table 3) High Speed Steels, THS (Table 4) Table l Unalloyed Cold Work Tool Steels, TC ( Clauses 1.1 and 2 ) Grade Designation Chemical Composition. Percent as per IS 1762 (Part 1) : 1974 YE Si M;;\ (I) (2) (3) (4) (5) TC 1 SOT8 0.4%0.55 0.1 o0.3.5 0.600.90 TC 2 SST8 0.X)0.60 0. I oo.35 0.600.90 TC 3 6OT6 0.5.50.65 0. IOO.35 0.500.80 TC 4 6ST6 0.600.70 0.1 oo.35 0.500.80 TC 5 70T6 0.650.75 0.100.3s 0.500.80 TC 6 7ST6 0.700.80 0.100.35 0.500.80 TC 7 80T6 0.750.85 0. IOO.35 0.500.x0 TC X 8ST6 0.800.90 0. IOO.35 0.500.80 TC 9 70T3 0.65X.75 0.100.30 0.40 Ma TC 10 8OT3 0.750.85 0. 100.30 0.40 MUX TC II 90T3 0.8%0.95 0. I o0.30 0.40 Mtrx TC 12 103T3 0.951.10 0.1 o0.30 0.40 MUX TC 13 I 18T3 1.101.2s 0. IOO.30 0.40 Mu TC 14 133T3 1.251.40 0. IOO.30 0.40 MUX NOTES 1 For all steels: S and P 0.035 percent, A4r1.v. 2 For all steels: CI 0.20 percent Mu. Cu 0.25 percent MUX and Ni 0.25 percent, Mrs.
IS 1570 ( Part 6 ) : 1996. Table 2 Alloyed Gold Work Toal Steels, TAG ( Clauses 1.1 and 2 ) Grade Designation as per IS 1762 (Part 1) : 1974 4 (1) *(2) (3) Si (4) Chemical Composition, Percent Ml1 Ni Cr MO V W 0) (6) (7) (8) (9) (IO) TAC I TXOV2 0.750.8.5 0.100.3.5 0.40 MUX TAC 2 T90V2 0.850.95 0. IOO.35 0.40 Max TAC 3 T103V2 0.95O. 10 0.100.3s 0.40 MUX TAC 4 TI 1802 1.101.2s 0.1 oo.35 0.40 MUX TAC 5 TI3SCr2 1.251.40 0.100.35 0.40 MUX TAC 6 TIOSCrS 0.90 1.20 0.100.3s 0.200.40 TAC 7 TlOSCrSMn2 0.901.20 0. I oo.35 0.400.80 TAC 8 T140WlSCr2 1.30I.50 0.100.3s 0.2%o.so TAC 9 T60Ni.5 O.SS0.65 0.100.3s 0.x0.80 TAC IO T40Ni14 0.x0.45 0.100.15 0.500.80 TAC I I T30Ni16CrS 0.250.3s 0. IOO.35 0.400.70 TAC 12 TSSNi6Cr3 0.500.60 0.100.3s 0.500.80 TAC 13 TSONiCrMo4 0.4%0.55 0.100.35 0.500.80 0.300.60 0.300.60 1.OO I.60 I.OO I.60 0.300.70 I.oo 1.so 0.30 MUX 3.203.60 0.30 Max 3.904.30 1.101.40 1.25I.65 0.500.80 0.801.00 0.801.00 0.300.40 0. I so.30 0.150.30 0. ISO.30 0.30 MLx 0.30 MUX 3.504.20 TAC I4 TSSNibC3Mo3 0.500.60 0. I oo.35 0.500.80 1.251.75 0.500.80 0.250.3s TAC IS T4ONi6Cr4Mo.3 0.350.45 0. IOO.35 0.400.70 1.251.75 0.90I.30 0.200.3s TAC 16 T30NiIOCr3Mo6 0.2.50.35 0.100.3.5 0.400.70 2.252.7s 0.500.80 0.400.70 TAC 17 T4ONiIOCr3Mo6 0.350.4.5 0.100.7.5 0.400.70 2.252.75 0.500.80 0.400.70 TAC 18 TIOSW6CrV2 0.90l.20 0: 100.3s 0.40 Max 0.400.80 0.25 Mu 0.200.30 1.251.7.5 TAC 19 Tl IOMn4W6Cr4 1.001.20 0.1003 0.90 1.30 0.90l.30 I.2s 1.75 TAC 20 T90Mn6WCr2 0.8%0.9s 0.100.3.5 I.25I.75 0.300.60 0.25 MUX ') 0.400.60 TAC 21 XTI60Cr12 1.501.70 0.1 oo.35 0.250.55 11.o13.0 0.80 MUX 0.80 MUX TAC 22 XT2ISCr12 2.002.30 0. I oo.35 0.2s0.50 11.013.0 0.80 Mtrxl 0.80 MUX') TAC 23 TSSCr3 0.500.60 0.100.4.5 0.600.80 0.600.80 TAC 24 T4SCrSSi3 0.400.50 0.801.10 o.ss0.75 1.201.60 TAC 25 TSSCr3V2 O.SO0.60 0. IOO.35 0.600.80 0.600.80 0. I o0.20 TAC 26 TSOCr4V2 0.4505s 0.100.3s 0.500.80 0.90. I.20 0. I s0.30 TAC 27 TSSSi7 0.500.60 1.so2.00 0.80I.OO TAC 2X TSSSi7Mo3 0.500.60 1.SO~2.00 0.80I.OO 0.250.40 0.120.20 TAC 29 T4OW8CrSV2 0.350.4s o.so 1.oo 0.200.40 I.oo I.so 0.100.25 1.lS2.25 TAC 30 TSOW8CrSV2 0.4%0.55 0.50l.oo 0.200.40 1.00I.SO 0. IOO.25 I.7S2.25 NOTE For all steels: P and S 0.035 percent, MUX each. ) Optional (wherever optional limit for molybdenum is given, it would apply to either molybdenum alone or molybdenum and tungsten together). 2
Table 3 Alloyed Hot Work Tool Steels, TAH ( Cluuses 1.l and 2 ) IS 1570 ( Part 6 ) : 1996 Grade Designation Chemical Composition, Percent as per IS 1762 (Part 1) : 1974 C Si Mn Ni Cr (1) (2) (3) (4) (3 (6) (7) TAH I XT33W9Cr3V4 0.250.40 0. IOO.35 0.200.40 2.803.30 TAH 2 XT35CrSMolV3 0.300.40 0.80 1.20 0.250.50 4.755.50 TAH 3 XT3SCrSMoV I 0.300.40 0.801.20 0.250.50 4.7s5.50 TAH 4 XT3SCrSMoW IV3 0.300.40 0.801.20 0.250.50 4.755.50 TAH 5 XTSSW 14Cr3V4 0.500.60 0. IOO.35 0.200.40 2.803.30 TAH 6 TSSNi7CrSMo3V 1 0.500.60 0.100.3s 0.650.95 I.SO I.80 0.600.80 TAH 7 TSSNi7Cr4MoSV 1 0.500.60 0.100.3s 0.650.95 I.%)I.80 1.001.20 MO (8) 1 JO 1.60 I.20 1.60 1.201.60 0.250.3s 0.450.55 V (9) (:I 0.250.50 8.0 10.0 0.200.40 1.001.20 0.200.40 1.20I.60 0.300.60 13.0. IS.0 0.07o. 12 0.07O. 12 NOTE For all steels: S and P 0.035 percent, Max each. Table 4 High Speed Steels, THS ( Clauses 1.I and 2 ) Grade ~Designation as per IS 1762 (Part 1) : 1974 A C (1) (2) (3 co (4) Chemical Composition, Percent Cr (3 Mii (6) V (7) WY (8) THS I XT78W 18Cr4V 1 0.730.33 3.m4.so 0.90 1.20 17.201x.70 THS 2 XTIOOMo9Cr4W2V2 0~951.0s 3.m4.50 8.009.00 I.702.20 1.so2.10 THS 3 XT82Mo8Cr4W 1 V 1 0.770.87 3.504.50 8.009.00 0.90I.40 1.402.00 THS 4 XT87W6MoSCr4V2 0.820.92 3.504.m 4.605.30 1.702.20 5.706.70 THS 5 XTl22W6MoSCr4V3 I.151.30 3.504.50 4.605.30 2.703.20 5.706.70 THS 6 XT8OW I3Co I OCr4V2 0.7%0.85 9.5010.50 3.m4.50 1.30I.80 17.2018.70 THS 7 XTIOW lscoscr4molvl 0.750.85 4.705.20 3.504.50 0.70I.oo 1.101.60 17.2018.70 THS 8 XT90W6CoSMoSCr4V2 0.850.9.5 4.705.20 3.504.50 4.605.30 1.702.20 s.70.6.70 THS 9 XTlS2Wl2CoSVSCr4Mol 1.451.60 4.70S.20 3.504.50 0.70I.oo 4.7ss.55 11.513.0 THS 10 XT127WlOColOCr4Mo4V3 1.201.35 9.5010.50 3.504.50 3.203.90 3.003.50 9.010.0 THSll XT1 12Mo9CoKr4W2Vl 1.os I.20 7.508.50 3.504.50 9.00 IO.00 0.90. I.40 I.301.90 THS 12 XT1 12W7CoSCr4Mo4V2 1.05l.20 4.705.20 3.504.50 L3.504.20 1.702.20 6.407.40 NOTES For all grades, Si = 0.50 percent, Max, Mn = 0.40 percent, Mm, P = 0.030 percent, Mnx, S = 0.030 percent, Mu. Where Co and MO are not specified, these should not be intentionally added and should not exceed the limits of Co = 1.00 percent, Mm, and MO = 0.70 percent, Mu.
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