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IS 3748 T55Si7 vs IS 11169 (Part 1) 18C10BT

Related Material — 65% match based on chemical composition and mechanical property overlap.

IS 3748 T55Si7 (IS 3748:1990) and IS 11169 (Part 1) 18C10BT (IS 11169 (Part 1):2022) are both steel grades. IS 3748 T55Si7 is classified under Tool & Die Steels, while IS 11169 (Part 1) 18C10BT is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below. IS 3748 T55Si7 is typically used for cold work tools and dies for blanking, trimming, chipping and shearing, while IS 11169 (Part 1) 18C10BT is commonly used for cold heading and cold extrusion of parts that are case hardened; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, annex b). IS 3748 T55Si7 is defined under Bureau of Indian Standards (IS), originating from India, while IS 11169 (Part 1) 18C10BT is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 3748 T55Si7 vs IS 11169 (Part 1) 18C10BT is a 73.8% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 65%.

Frequently Compared With IS 3748 T55Si7:
IS 1570 (Part 6) 60T6 EN ISO 4957 1.2316 DIN EN ISO 4957 1.2344 DIN EN ISO 4957 1.2379 IS 1570 (Part 6) 133T3 IS 1570 (Part 6) 70T6 EN ISO 683-17 100Cr6 IS 3748 103T3 IS 1570 (Part 6) 103T3 IS 3748 118T3 IS 1570 (Part 6) 118T3 IS 3748 133T3
Match Breakdown
CHEMISTRY MATCH
73.8%
MECHANICAL MATCH
No shared data
OVERALL
65%
Specifications
Property IS 3748 T55Si7 IS 11169 (Part 1) 18C10BT
Standard IS 3748:1990 IS 11169 (Part 1):2022
Category Tool & Die Steels Alloy Steel
C (%) 0.50-0.60 0.16-0.20
Si (%) 1.50-2.00 <=0.30
Mn (%) 0.80-1.00 0.90-1.20
S (%) <=0.035 <=0.025
P (%) <=0.035 <=0.025
B (%) Not specified 0.0008-0.005
Cu (%) Not specified <=0.25
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 3748 T55Si7 IS 11169 (Part 1) 18C10BT
Hardness <=230 HB Not specified
Condition Annealed (maximum Brinell hardness) Not specified
Tensile Strength, as rolled (+AR) Not specified <=580 MPa (over 5 to 40 mm)
Typical Applications
IS 3748 T55Si7
Cold work tools and dies for blanking, trimming, chipping and shearing
IS 11169 (Part 1) 18C10BT
Cold heading and cold extrusion of parts that are case hardened; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, Annex B)
Key Differences
Can IS 3748 T55Si7 Be Substituted With IS 11169 (Part 1) 18C10BT?
IS 3748 T55Si7 and IS 11169 (Part 1) 18C10BT share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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IS 3748 T55Si7
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IS 11169 (Part 1) 18C10BT
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Frequently Asked Questions
What is the difference between IS 3748 T55Si7 and IS 11169 (Part 1) 18C10BT?
Different category: IS 3748 T55Si7 is Tool & Die Steels, IS 11169 (Part 1) 18C10BT is Alloy Steel. IS 11169 (Part 1) 18C10BT specifies B, Cu which are not specified for IS 3748 T55Si7.
Can IS 3748 T55Si7 be substituted with IS 11169 (Part 1) 18C10BT?
IS 3748 T55Si7 and IS 11169 (Part 1) 18C10BT share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.