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IS 3748:1990 T55Si7 Steel: Specifications & Listings

IS 3748:1990 T55Si7: T55Si7: cold work tool and die steel. Specified in IS 3748:1990.

Category: Tool & Die Steels
Grade Details
GradeIS 3748:1990 T55Si7
Standard IS 3748:1990
ApplicationsCold work tools and dies for blanking, trimming, chipping and shearing
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
IS 1570 (Part 6) T55Si7 IS 1570 (Part 6):1996 India No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
IS 1570 (Part 6) T55Si7 IS 1570 (Part 6):1996 Strong Match
IS 1570 (Part 6) T80V2 IS 1570 (Part 6):1996 Related Material
IS 1570 (Part 6) T90V2 IS 1570 (Part 6):1996 Related Material
IS 1570 (Part 6) T103V2 IS 1570 (Part 6):1996 Related Material
SAE J404 1330 SAE J404:2009 Related Material
CSA G40.21 350WT CSA G40.21-13 (R2023) Related Material
IS 1570 (Part 4) 36Si7 IS 1570 (Part 4):1988 Related Material
IS 11169 (Part 1) 18C10BT IS 11169 (Part 1):2022 Related Material
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Si Mn S P
0.50-0.60 1.50-2.00 0.80-1.00 <=0.035 <=0.035
Mechanical Properties
Hardness <=230 HB
Condition Annealed (maximum Brinell hardness)

More data from IS 3748:1990

From the standard
Maximum hardness in annealed condition 1 condition
ConditionMaximum hardness (HB)
Annealed230
Brinell hardness tested per IS 1500; steels are supplied annealed unless specified otherwise.
Source: IS 3748:1990, Clause 9.1

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