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ASTM A681 A2 vs JIS G4105 SCM435

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

ASTM A681 A2 (ASTM A681:2008) and JIS G4105 SCM435 (JIS G4105:1979) are both steel grades. ASTM A681 A2 is classified under Tool & Die Steels, while JIS G4105 SCM435 is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below. ASTM A681 A2 is typically used for tools, dies and fixtures (clause 1.2), while JIS G4105 SCM435 is commonly used for gears, shafts, high tensile bolts. ASTM A681 A2 is defined under ASTM International, originating from United States, while JIS G4105 SCM435 is defined under Japanese Industrial Standards (JIS), originating from Japan.

As per chemical composition, ASTM A681 A2 vs JIS G4105 SCM435 is a 62.7% match. As per mechanical properties, the match is 100%. Combined, this makes them a related material overall at 65%.

Frequently Compared With ASTM A681 A2:
GOST 5950 4H5MFS1 DIN EN ISO 4957 1.2344 GOST 5950 3H2W8F GB/T 1299 4Cr5MoSiV1 EN ISO 4957 1.2316 IS 1570 (Part 6) 103T3 IS 1570 (Part 6) 133T3 GB/T 1299 4Cr5MoSiV GOST 5950 4H5MFS DIN EN ISO 4957 1.2379 IS 1570 (Part 6) 118T3 GB/T 1299 3Cr2W8V
Match Breakdown
CHEMISTRY MATCH
62.7%
MECHANICAL MATCH
100%
OVERALL
65%
Specifications
Property ASTM A681 A2 JIS G4105 SCM435
Standard ASTM A681:2008 JIS G4105:1979
Category Tool & Die Steels Alloy Steel
C (%) 0.95-1.05 0.33–0.38
Mn (%) 0.40-1.00 0.60–0.90
P (%) <=0.030 Not specified
S (%) <=0.030 Not specified
Si (%) 0.10-0.50 0.15–0.35
Cr (%) 4.75-5.50 0.90–1.20
V (%) 0.15-0.50 Not specified
Mo (%) 0.90-1.40 0.15–0.30
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 A2 JIS G4105 SCM435
Hardness <=248 HB 248–302 HB
Condition Annealed (maximum Brinell hardness) Not specified
Tensile Strength Not specified ≥830 MPa
Yield Strength Not specified ≥685 MPa
Elongation Not specified ≥15%
Typical Applications
ASTM A681 A2
Tools, dies and fixtures (clause 1.2)
JIS G4105 SCM435
Gears, shafts, high tensile bolts
Key Differences
Can ASTM A681 A2 Be Substituted With JIS G4105 SCM435?
ASTM A681 A2 and JIS G4105 SCM435 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 A2
No active listings currently.
JIS G4105 SCM435
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4600–5300 mm (181.1–208.66 in)
On M-EX Right Now
ASTM A681 A2
0 active listings and RFQs →
JIS G4105 SCM435
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between ASTM A681 A2 and JIS G4105 SCM435?
Different category: ASTM A681 A2 is Tool & Die Steels, JIS G4105 SCM435 is Alloy Steel. ASTM A681 A2 specifies P, S, V which are not specified for JIS G4105 SCM435.
Can ASTM A681 A2 be substituted with JIS G4105 SCM435?
ASTM A681 A2 and JIS G4105 SCM435 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.