Related Material — 65% match
based on chemical composition and mechanical property overlap.
ASTM A681 A4 (ASTM A681:2008) and SAE J404 4135 (SAE J404:2009) are both steel grades.
ASTM A681 A4 is classified under Tool & Die Steels, while SAE J404 4135 is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below.
ASTM A681 A4 is typically used for tools, dies and fixtures (clause 1.2), while SAE J404 4135 is commonly used for gears, shafts, pressure vessels, high tensile bolts.
ASTM A681 A4 is defined under ASTM International, originating from United States, while SAE J404 4135 is defined under SAE International, originating from United States.
As per chemical composition, ASTM A681 A4 vs SAE J404 4135 is a 67.1% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a related material overall at 65%.
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 A4
SAE J404 4135
Hardness
<=241 HB
Not specified
Condition
Annealed (maximum Brinell hardness)
Not specified
Typical Applications
ASTM A681 A4
Tools, dies and fixtures (clause 1.2)
SAE J404 4135
Gears, shafts, pressure vessels, high tensile bolts
Key Differences
Different category: ASTM A681 A4 is Tool & Die Steels, SAE J404 4135 is Alloy Steel.
Can ASTM A681 A4 Be Substituted With SAE J404 4135?
ASTM A681 A4 and SAE J404 4135 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.
What is the difference between ASTM A681 A4 and SAE J404 4135?
Different category: ASTM A681 A4 is Tool & Die Steels, SAE J404 4135 is Alloy Steel.
Can ASTM A681 A4 be substituted with SAE J404 4135?
ASTM A681 A4 and SAE J404 4135 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.