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ASTM A681 A10 vs BS 970 (Part 1) 665H17

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

ASTM A681 A10 (ASTM A681:2008) and BS 970 (Part 1) 665H17 (BS 970 (Part 1):1991) are both steel grades. ASTM A681 A10 is classified under Tool & Die Steels, while BS 970 (Part 1) 665H17 is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below. ASTM A681 A10 is typically used for tools, dies and fixtures (clause 1.2), while BS 970 (Part 1) 665H17 is commonly used for case hardening steel (section four). ASTM A681 A10 is defined under ASTM International, originating from United States, while BS 970 (Part 1) 665H17 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, ASTM A681 A10 vs BS 970 (Part 1) 665H17 is a 69.3% 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 ASTM A681 A10:
GOST 5950 4H5MFS1 IS 1570 (Part 6) 133T3 GOST 5950 3H2W8F EN ISO 4957 1.2316 DIN EN ISO 4957 1.2344 DIN EN ISO 4957 1.2379 GB/T 1299 4Cr5MoSiV1 GOST 5950 4H5MFS EN ISO 683-17 100Cr6 IS 1570 (Part 6) 103T3 GB/T 1299 3Cr2W8V GB/T 1299 4Cr5MoSiV
Match Breakdown
CHEMISTRY MATCH
69.3%
MECHANICAL MATCH
No shared data
OVERALL
65%
Specifications
Property ASTM A681 A10 BS 970 (Part 1) 665H17
Standard ASTM A681:2008 BS 970 (Part 1):1991
Category Tool & Die Steels Alloy Steel
C (%) 1.25-1.50 0.14-0.20
Mn (%) 1.60-2.10 0.35-0.75
P (%) <=0.030 Not specified
S (%) <=0.030 Not specified
Si (%) 1.00-1.50 Not specified
Mo (%) 1.25-1.75 0.20-0.30
Ni (%) 1.55-2.05 1.50-2.00
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 A10 BS 970 (Part 1) 665H17
Hardness <=269 HB Not specified
Condition Annealed (maximum Brinell hardness) Not specified
Typical Applications
ASTM A681 A10
Tools, dies and fixtures (clause 1.2)
BS 970 (Part 1) 665H17
Case hardening steel (section four)
Key Differences
Can ASTM A681 A10 Be Substituted With BS 970 (Part 1) 665H17?
ASTM A681 A10 and BS 970 (Part 1) 665H17 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 A10
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Frequently Asked Questions
What is the difference between ASTM A681 A10 and BS 970 (Part 1) 665H17?
Different category: ASTM A681 A10 is Tool & Die Steels, BS 970 (Part 1) 665H17 is Alloy Steel. ASTM A681 A10 specifies P, S, Si which are not specified for BS 970 (Part 1) 665H17.
Can ASTM A681 A10 be substituted with BS 970 (Part 1) 665H17?
ASTM A681 A10 and BS 970 (Part 1) 665H17 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.