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ASTM A681 P21 vs IS 3748 T30Ni16Cr5

Related Material — 65.8% match based on chemical composition and mechanical property overlap.

ASTM A681 P21 (ASTM A681:2008) and IS 3748 T30Ni16Cr5 (IS 3748:1990) are both steel grades. Both fall under the Tool & Die Steels category. ASTM A681 P21 is typically used for tools, dies and fixtures (clause 1.2), while IS 3748 T30Ni16Cr5 is commonly used for cold work tools and dies for blanking, trimming, chipping and shearing. ASTM A681 P21 is defined under ASTM International, originating from United States, while IS 3748 T30Ni16Cr5 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, ASTM A681 P21 vs IS 3748 T30Ni16Cr5 is a 65.8% 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 65.8%.

Frequently Compared With ASTM A681 P21:
GB/T 1299 4Cr5MoSiV DIN EN ISO 4957 1.2379 IS 1570 (Part 6) 103T3 GOST 5950 4H5MFS1 EN ISO 4957 1.2316 DIN EN ISO 4957 1.2344 EN ISO 683-17 100Cr6 IS 1570 (Part 6) 118T3 IS 1570 (Part 6) 133T3 GOST 5950 3H2W8F GB/T 1299 4Cr5MoSiV1 GOST 5950 4H5MFS
Match Breakdown
CHEMISTRY MATCH
65.8%
MECHANICAL MATCH
No shared data
OVERALL
65.8%
Specifications
Property ASTM A681 P21 IS 3748 T30Ni16Cr5
Standard ASTM A681:2008 IS 3748:1990
Category Tool & Die Steels Tool & Die Steels
C (%) 0.18-0.22 0.26-0.34
Mn (%) 0.20-0.40 0.40-0.70
P (%) <=0.030 <=0.035
S (%) <=0.030 <=0.035
Si (%) 0.20-0.40 0.10-0.35
Cr (%) 0.20-0.30 1.10-1.40
V (%) 0.15-0.25 Not specified
Ni (%) 3.90-4.25 3.90-4.30
Al (%) 1.05-1.25 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 P21 IS 3748 T30Ni16Cr5
Hardness Not specified <=255 HB
Condition Not specified Annealed (maximum Brinell hardness)
Typical Applications
ASTM A681 P21
Tools, dies and fixtures (clause 1.2)
IS 3748 T30Ni16Cr5
Cold work tools and dies for blanking, trimming, chipping and shearing
Key Differences
Can ASTM A681 P21 Be Substituted With IS 3748 T30Ni16Cr5?
ASTM A681 P21 and IS 3748 T30Ni16Cr5 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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ASTM A681 P21
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IS 3748 T30Ni16Cr5
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Frequently Asked Questions
What is the difference between ASTM A681 P21 and IS 3748 T30Ni16Cr5?
ASTM A681 P21 specifies V, Al which are not specified for IS 3748 T30Ni16Cr5.
Can ASTM A681 P21 be substituted with IS 3748 T30Ni16Cr5?
ASTM A681 P21 and IS 3748 T30Ni16Cr5 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.