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ASTM A681 O6 vs ASTM A681 A3

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

ASTM A681 O6 (ASTM A681:2008) and ASTM A681 A3 (ASTM A681:2008) are both steel grades. Both fall under the Tool & Die Steels category. ASTM A681 O6 is typically used for tools, dies and fixtures (clause 1.2), while ASTM A681 A3 is commonly used for tools, dies and fixtures (clause 1.2). ASTM A681 O6 is defined under ASTM International, originating from United States, while ASTM A681 A3 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A681 O6 vs ASTM A681 A3 is a 62.5% match. As per mechanical properties, the match is 100%. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With ASTM A681 O6:
EN ISO 683-17 100Cr6 GOST 5950 3H2W8F GB/T 1299 4Cr5MoSiV1 DIN EN ISO 4957 1.2379 IS 1570 (Part 6) 103T3 IS 1570 (Part 6) 118T3 GB/T 1299 4Cr5MoSiV GOST 5950 4H5MFS GOST 5950 4H5MFS1 EN ISO 4957 1.2316 DIN EN ISO 4957 1.2344 IS 1570 (Part 6) 133T3
Match Breakdown
CHEMISTRY MATCH
62.5%
MECHANICAL MATCH
100%
OVERALL
69.9%
Specifications
Property ASTM A681 O6 ASTM A681 A3
Standard ASTM A681:2008 ASTM A681:2008
Category Tool & Die Steels Tool & Die Steels
C (%) 1.25-1.55 1.20-1.30
Mn (%) 0.30-1.10 0.40-0.60
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.030
Si (%) 0.55-1.50 0.10-0.70
Cr (%) <=0.30 4.75-5.50
Mo (%) 0.20-0.30 0.90-1.40
V (%) Not specified 0.80-1.40
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 O6 ASTM A681 A3
Hardness <=229 HB <=229 HB
Condition Annealed (maximum Brinell hardness) Annealed (maximum Brinell hardness)
Typical Applications
ASTM A681 O6
Tools, dies and fixtures (clause 1.2)
ASTM A681 A3
Tools, dies and fixtures (clause 1.2)
Key Differences
Can ASTM A681 O6 Be Substituted With ASTM A681 A3?
ASTM A681 O6 and ASTM A681 A3 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 O6
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ASTM A681 A3
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Frequently Asked Questions
What is the difference between ASTM A681 O6 and ASTM A681 A3?
ASTM A681 A3 specifies V which is not specified for ASTM A681 O6.
Can ASTM A681 O6 be substituted with ASTM A681 A3?
ASTM A681 O6 and ASTM A681 A3 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.