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ASTM A681 S7 vs ASTM A681 O6

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

ASTM A681 S7 (ASTM A681:2008) and ASTM A681 O6 (ASTM A681:2008) are both steel grades. Both fall under the Tool & Die Steels category. ASTM A681 S7 is typically used for tools, dies and fixtures (clause 1.2), while ASTM A681 O6 is commonly used for tools, dies and fixtures (clause 1.2). ASTM A681 S7 is defined under ASTM International, originating from United States, while ASTM A681 O6 is defined under ASTM International, originating from United States.

As per chemical composition, ASTM A681 S7 vs ASTM A681 O6 is a 65.7% 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 S7:
DIN EN ISO 4957 1.2344 IS 1570 (Part 6) 133T3 GB/T 1299 4Cr5MoSiV1 EN ISO 4957 1.2316 GB/T 1299 3Cr2W8V GOST 5950 4H5MFS1 GB/T 1299 4Cr5MoSiV DIN EN ISO 4957 1.2379 EN ISO 683-17 100Cr6 IS 1570 (Part 6) 118T3 GOST 5950 3H2W8F GOST 5950 4H5MFS
Match Breakdown
CHEMISTRY MATCH
65.7%
MECHANICAL MATCH
100%
OVERALL
69.9%
Specifications
Property ASTM A681 S7 ASTM A681 O6
Standard ASTM A681:2008 ASTM A681:2008
Category Tool & Die Steels Tool & Die Steels
C (%) 0.45-0.55 1.25-1.55
Mn (%) 0.20-0.90 0.30-1.10
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.030
Si (%) 0.20-1.00 0.55-1.50
Cr (%) 3.00-3.50 <=0.30
V (%) <=0.35 Not specified
Mo (%) 1.30-1.80 0.20-0.30
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 S7 ASTM A681 O6
Hardness <=229 HB <=229 HB
Condition Annealed (maximum Brinell hardness) Annealed (maximum Brinell hardness)
Typical Applications
ASTM A681 S7
Tools, dies and fixtures (clause 1.2)
ASTM A681 O6
Tools, dies and fixtures (clause 1.2)
Key Differences
Can ASTM A681 S7 Be Substituted With ASTM A681 O6?
ASTM A681 S7 and ASTM A681 O6 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 S7
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ASTM A681 O6
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Frequently Asked Questions
What is the difference between ASTM A681 S7 and ASTM A681 O6?
ASTM A681 S7 specifies V which is not specified for ASTM A681 O6.
Can ASTM A681 S7 be substituted with ASTM A681 O6?
ASTM A681 S7 and ASTM A681 O6 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.