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ASTM A681 O6 vs EN ISO 683-17 100Cr6

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

ASTM A681 O6 (ASTM A681:2008) and EN ISO 683-17 100Cr6 (EN ISO 683-17:2014) 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 EN ISO 683-17 100Cr6 is commonly used for rolling element bearings, precision components, cold work tooling. ASTM A681 O6 is defined under ASTM International, originating from United States, while EN ISO 683-17 100Cr6 is defined under European Standard (EN), originating from Europe.

As per chemical composition, ASTM A681 O6 vs EN ISO 683-17 100Cr6 is a 63.7% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With ASTM A681 O6:
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 GB/T 1299 3Cr2W8V
Match Breakdown
CHEMISTRY MATCH
63.7%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property ASTM A681 O6 EN ISO 683-17 100Cr6
Standard ASTM A681:2008 EN ISO 683-17:2014
Category Tool & Die Steels Tool & Die Steels
C (%) 1.25-1.55 0.93–1.05
Mn (%) 0.30-1.10 0.25–0.45
P (%) <=0.030 ≤0.025
S (%) <=0.030 ≤0.025
Si (%) 0.55-1.50 0.15–0.35
Cr (%) <=0.30 1.35–1.65
Mo (%) 0.20-0.30 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 O6 EN ISO 683-17 100Cr6
Hardness <=229 HB Not specified
Condition Annealed (maximum Brinell hardness) Not specified
Tensile Strength Not specified ≥620 MPa (annealed)
Hardness HRC Not specified 60–66 (hardened)
Hardness HB Not specified 179–217 (annealed)
Typical Applications
ASTM A681 O6
Tools, dies and fixtures (clause 1.2)
EN ISO 683-17 100Cr6
Rolling element bearings, precision components, cold work tooling
Key Differences
Can ASTM A681 O6 Be Substituted With EN ISO 683-17 100Cr6?
ASTM A681 O6 and EN ISO 683-17 100Cr6 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 O6
No active listings currently.
EN ISO 683-17 100Cr6
Round Bar → (18 listings)
Diameter: 80–80 mm (3.15–3.15 in)
Length: 3000–6500 mm (118.11–255.91 in)
On M-EX Right Now
ASTM A681 O6
0 active listings and RFQs →
EN ISO 683-17 100Cr6
18 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 O6 and EN ISO 683-17 100Cr6?
ASTM A681 O6 specifies Mo which is not specified for EN ISO 683-17 100Cr6.
Can ASTM A681 O6 be substituted with EN ISO 683-17 100Cr6?
ASTM A681 O6 and EN ISO 683-17 100Cr6 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.