Close Alternative — 84.9% match
based on chemical composition and mechanical property overlap.
ASTM A681 A4 (ASTM A681:2008) and ASTM A681 A5 (ASTM A681:2008) are both steel grades.
Both fall under the Tool & Die Steels category.
ASTM A681 A4 is typically used for tools, dies and fixtures (clause 1.2), while ASTM A681 A5 is commonly used for tools, dies and fixtures (clause 1.2).
ASTM A681 A4 is defined under ASTM International, originating from United States, while ASTM A681 A5 is defined under ASTM International, originating from United States.
As per chemical composition, ASTM A681 A4 vs ASTM A681 A5 is a 89.6% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a close alternative overall at 84.9%.
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
ASTM A681 A5
Hardness
<=241 HB
Not specified
Condition
Annealed (maximum Brinell hardness)
Not specified
Typical Applications
ASTM A681 A4
Tools, dies and fixtures (clause 1.2)
ASTM A681 A5
Tools, dies and fixtures (clause 1.2)
Can ASTM A681 A4 Be Substituted With ASTM A681 A5?
ASTM A681 A4 and ASTM A681 A5 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
What is the difference between ASTM A681 A4 and ASTM A681 A5?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A681 A4 be substituted with ASTM A681 A5?
ASTM A681 A4 and ASTM A681 A5 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.