Close Alternative — 76.3% match
based on chemical composition and mechanical property overlap.
ASTM A240/A240M S32205 (ASTM A240/A240M:2025) and ASTM A959 255 (ASTM A959:2011) are both steel grades.
Both fall under the Stainless Steel category.
ASTM A240/A240M S32205 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A959 255 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1).
ASTM A240/A240M S32205 is defined under ASTM International, originating from United States, while ASTM A959 255 is defined under ASTM International, originating from United States.
As per chemical composition, ASTM A240/A240M S32205 vs ASTM A959 255 is a 76.3% 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 76.3%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
ASTM A240/A240M S32205
ASTM A959 255
Tensile Strength
>=655 MPa
Not specified
Yield Strength
>=450 MPa
Not specified
Elongation
>=25%
Not specified
Hardness
<=293 HB
Not specified
Condition
Plate, sheet and strip; yield by 0.2 percent offset
Not specified
Typical Applications
ASTM A240/A240M S32205
Pressure vessels and general applications (plate, sheet and strip)
ASTM A959 255
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
ASTM A959 255 specifies Cu which is not specified for ASTM A240/A240M S32205.
Can ASTM A240/A240M S32205 Be Substituted With ASTM A959 255?
ASTM A240/A240M S32205 and ASTM A959 255 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 A240/A240M S32205 and ASTM A959 255?
ASTM A959 255 specifies Cu which is not specified for ASTM A240/A240M S32205.
Can ASTM A240/A240M S32205 be substituted with ASTM A959 255?
ASTM A240/A240M S32205 and ASTM A959 255 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.