Strong Match — 92.8% match
based on chemical composition and mechanical property overlap.
ASTM A959 800 (ASTM A959:2011) and ASTM A240/A240M N08811 (ASTM A240/A240M:2025) are both steel grades.
Both fall under the Stainless Steel category.
ASTM A959 800 is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while ASTM A240/A240M N08811 is commonly used for pressure vessels and general applications (plate, sheet and strip).
ASTM A959 800 is defined under ASTM International, originating from United States, while ASTM A240/A240M N08811 is defined under ASTM International, originating from United States.
As per chemical composition, ASTM A959 800 vs ASTM A240/A240M N08811 is a 92.8% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a strong match overall at 92.8%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
ASTM A959 800
ASTM A240/A240M N08811
Tensile Strength
Not specified
>=450 MPa
Yield Strength
Not specified
>=170 MPa
Elongation
Not specified
>=30%
Condition
Not specified
Plate, sheet and strip; yield by 0.2 percent offset
Typical Applications
ASTM A959 800
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
ASTM A240/A240M N08811
Pressure vessels and general applications (plate, sheet and strip)
Can ASTM A959 800 Be Substituted With ASTM A240/A240M N08811?
ASTM A959 800 and ASTM A240/A240M N08811 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M N08811 is often considered as a substitute for ASTM A959 800 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between ASTM A959 800 and ASTM A240/A240M N08811?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A959 800 be substituted with ASTM A240/A240M N08811?
ASTM A959 800 and ASTM A240/A240M N08811 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M N08811 is often considered as a substitute for ASTM A959 800 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.