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ASTM A681 H21 vs IS 3748 103T3

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

ASTM A681 H21 (ASTM A681:2008) and IS 3748 103T3 (IS 3748:1990) are both steel grades. Both fall under the Tool & Die Steels category. ASTM A681 H21 is typically used for hot extrusion dies, hot forging dies for brass/bronze, while IS 3748 103T3 is commonly used for cold work tools and dies for blanking, trimming, chipping and shearing. ASTM A681 H21 is defined under ASTM International, originating from United States, while IS 3748 103T3 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, ASTM A681 H21 vs IS 3748 103T3 is a 64.1% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With ASTM A681 H21:
EN ISO 4957 1.2316 EN ISO 683-17 100Cr6 GB/T 1299 4Cr5MoSiV GB/T 1299 4Cr5MoSiV1 AISI 52100 DIN EN ISO 4957 1.2344 DIN EN ISO 4957 1.2379 GB/T 1299 3Cr2W8V GOST 5950 3H2W8F GOST 5950 4H5MFS1 GOST 5950 4H5MFS IS 1570 (Part 6) 103T3
Match Breakdown
CHEMISTRY MATCH
64.1%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property ASTM A681 H21 IS 3748 103T3
Standard ASTM A681:2008 IS 3748:1990
Category Tool & Die Steels Tool & Die Steels
C (%) 0.26-0.36 0.95-1.10
Mn (%) 0.15-0.40 <=0.40
P (%) <=0.030 <=0.035
S (%) <=0.030 <=0.035
Si (%) 0.15-0.50 0.10-0.30
Cr (%) 3.00-3.75 Not specified
V (%) 0.30-0.60 Not specified
W (%) 8.50-10.00 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A681 H21 IS 3748 103T3
Hardness <=235 HB <=220 HB
Condition Annealed (maximum Brinell hardness) Annealed (maximum Brinell hardness)
Typical Applications
ASTM A681 H21
Hot extrusion dies, hot forging dies for brass/bronze
IS 3748 103T3
Cold work tools and dies for blanking, trimming, chipping and shearing
Key Differences
Can ASTM A681 H21 Be Substituted With IS 3748 103T3?
ASTM A681 H21 and IS 3748 103T3 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.
Forms & Sizes Available on M-EX
ASTM A681 H21
Flat Bar → (3 listings)
Thickness: 30–30 mm (1.18–1.18 in)
Width: 150–150 mm (5.91–5.91 in)
Length: 500–900 mm (19.69–35.43 in)
IS 3748 103T3
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On M-EX Right Now
ASTM A681 H21
3 active listings and RFQs →
IS 3748 103T3
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Frequently Asked Questions
What is the difference between ASTM A681 H21 and IS 3748 103T3?
ASTM A681 H21 specifies Cr, V, W which are not specified for IS 3748 103T3.
Can ASTM A681 H21 be substituted with IS 3748 103T3?
ASTM A681 H21 and IS 3748 103T3 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.