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ASTM A681 A8 vs EN ISO 683-17 100Cr6

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

ASTM A681 A8 (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 A8 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 A8 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 A8 vs EN ISO 683-17 100Cr6 is a 58.2% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With ASTM A681 A8:
IS 1570 (Part 6) 103T3 IS 1570 (Part 6) 133T3 GOST 5950 4H5MFS DIN EN ISO 4957 1.2344 DIN EN ISO 4957 1.2379 IS 1570 (Part 6) 118T3 GOST 5950 3H2W8F GB/T 1299 4Cr5MoSiV1 EN ISO 4957 1.2316 GB/T 1299 3Cr2W8V GB/T 1299 4Cr5MoSiV GOST 5950 4H5MFS1
Match Breakdown
CHEMISTRY MATCH
58.2%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property ASTM A681 A8 EN ISO 683-17 100Cr6
Standard ASTM A681:2008 EN ISO 683-17:2014
Category Tool & Die Steels Tool & Die Steels
C (%) 0.50-0.60 0.93–1.05
Mn (%) 0.20-0.50 0.25–0.45
P (%) <=0.030 ≤0.025
S (%) <=0.030 ≤0.025
Si (%) 0.75-1.10 0.15–0.35
Cr (%) 4.75-5.50 1.35–1.65
W (%) 1.00-1.50 Not specified
Mo (%) 1.15-1.65 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 A8 EN ISO 683-17 100Cr6
Hardness <=241 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 A8
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 A8 Be Substituted With EN ISO 683-17 100Cr6?
ASTM A681 A8 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 A8
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 A8
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 A8 and EN ISO 683-17 100Cr6?
ASTM A681 A8 specifies W, Mo which are not specified for EN ISO 683-17 100Cr6.
Can ASTM A681 A8 be substituted with EN ISO 683-17 100Cr6?
ASTM A681 A8 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.