Disclosure to Promote the Right To Information

Transcription

1 इ टरन ट म नक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live प0र 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New IS (1996): Schedules for Wrought Steels, Part 6: Carbon and Alloy Tool Steels [MTD 16: Alloy Steels and Forgings]! न $ एक न' भ रत क +नमण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen

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4 Indian Standard SCHEDULES FOR WROUGHT STEELS PART 6 CARBON AND ALLOY TOOL STEELS ( First Revision ) ICS ; BIS 1996 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI bxxrnhcr I996 Price Group 2

5 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 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 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 Tool steels, issued by International Organization for Standardization, ISO. DIN Tool steels, issued by Deutsches lnstitut Fur Normung, DIN. ASTM A Tool steels high speed, issued by American Society for Testing and Materials, ASTM. ASTM A 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.

6 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 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% o TC 2 SST8 0.X) I oo TC 3 6OT IOO TC 4 6ST oo TC 5 70T s TC 6 7ST TC 7 80T IOO x0 TC X 8ST IOO TC 9 70T3 0.65X Ma TC 10 8OT MUX TC II 90T3 0.8% I o Mtrx TC T o MUX TC 13 I 18T s 0. IOO Mu TC T IOO MUX NOTES 1 For all steels: S and P percent, A4r1.v. 2 For all steels: CI 0.20 percent Mu. Cu 0.25 percent MUX and Ni 0.25 percent, Mrs.

7 IS 1570 ( Part 6 ) : Table 2 Alloyed Gold Work Toal Steels, TAG ( Clauses 1.1 and 2 ) Grade Designation as per IS 1762 (Part 1) : (1) *(2) (3) Si (4) Chemical Composition, Percent Ml1 Ni Cr MO V W 0) (6) (7) (8) (9) (IO) TAC I TXOV MUX TAC 2 T90V IOO Max TAC 3 T103V2 0.95O s 0.40 MUX TAC 4 TI s 0.1 oo MUX TAC 5 TI3SCr MUX TAC 6 TIOSCrS s TAC 7 TlOSCrSMn I oo TAC 8 T140WlSCr2 1.30I s 0.2%o.so TAC 9 T60Ni.5 O.SS s 0.x0.80 TAC IO T40Ni14 0.x TAC I I T30Ni16CrS s 0. IOO TAC 12 TSSNi6Cr s TAC 13 TSONiCrMo4 0.4% OO I.60 I.OO I I.oo 1.so 0.30 MUX Max I I so ISO MLx 0.30 MUX TAC I4 TSSNibC3Mo I oo s TAC IS T4ONi6Cr4Mo IOO I s TAC 16 T30NiIOCr3Mo s TAC 17 T4ONiIOCr3Mo TAC 18 TIOSW6CrV2 0.90l.20 0: 100.3s 0.40 Max Mu TAC 19 Tl IOMn4W6Cr l.30 I.2s 1.75 TAC 20 T90Mn6WCr2 0.8%0.9s I.25I MUX ') TAC 21 XTI60Cr oo o MUX 0.80 MUX TAC 22 XT2ISCr I oo s Mtrxl 0.80 MUX') TAC 23 TSSCr TAC 24 T4SCrSSi o.ss TAC 25 TSSCr3V2 O.SO IOO I o0.20 TAC 26 TSOCr4V s s I I s0.30 TAC 27 TSSSi so I.OO TAC 2X TSSSi7Mo SO~ I.OO TAC 29 T4OW8CrSV s o.so 1.oo I.oo I.so lS2.25 TAC 30 TSOW8CrSV2 0.4% l.oo I.SO 0. IOO.25 I.7S2.25 NOTE For all steels: P and S percent, MUX each. ) Optional (wherever optional limit for molybdenum is given, it would apply to either molybdenum alone or molybdenum and tungsten together). 2

8 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 XT33W9Cr3V IOO TAH 2 XT35CrSMolV TAH 3 XT3SCrSMoV I s5.50 TAH 4 XT3SCrSMoW IV TAH 5 XTSSW 14Cr3V IOO TAH 6 TSSNi7CrSMo3V s I.SO I TAH 7 TSSNi7Cr4MoSV s I.%)I MO (8) 1 JO 1.60 I s V (9) (:I I IS o O. 12 NOTE For all steels: S and P 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 m4.so x.70 THS 2 XTIOOMo9Cr4W2V2 0~951.0s 3.m I so2.10 THS 3 XT82Mo8Cr4W 1 V I THS 4 XT87W6MoSCr4V m THS 5 XTl22W6MoSCr4V3 I THS 6 XT8OW I3Co I OCr4V2 0.7% m I THS 7 XTIOW lscoscr4molvl I.oo THS 8 XT90W6CoSMoSCr4V s THS 9 XTlS2Wl2CoSVSCr4Mol S I.oo 4.7ss THS 10 XT127WlOColOCr4Mo4V THSll XT1 12Mo9CoKr4W2Vl 1.os I IO I.40 I THS 12 XT1 12W7CoSCr4Mo4V2 1.05l L NOTES For all grades, Si = 0.50 percent, Max, Mn = 0.40 percent, Mm, P = percent, Mnx, S = 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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