Close Alternative — 83.3% match
based on chemical composition and mechanical property overlap.
ASTM A240/A240M S31803 (ASTM A240/A240M:2025) and ASTM A276/A276M S31803 (ASTM A276/A276M:2017) are both steel grades.
Both fall under the Stainless Steel category.
ASTM A240/A240M S31803 is typically used for pressure vessels and general applications (plate, sheet and strip), while ASTM A276/A276M S31803 is commonly used for stainless steel bars and shapes (hot-finished or cold-finished).
ASTM A240/A240M S31803 is defined under ASTM International, originating from United States, while ASTM A276/A276M S31803 is defined under ASTM International, originating from United States.
As per chemical composition, ASTM A240/A240M S31803 vs ASTM A276/A276M S31803 is a 100% match.
As per mechanical properties, the match is 50%.
Combined, this makes them a close alternative overall at 83.3%.
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 S31803
ASTM A276/A276M S31803
Tensile Strength
>=620 MPa
>=620 MPa
Yield Strength
>=450 MPa
>=448 MPa
Elongation
>=25%
>=25%
Hardness
<=293 HB
<=290 HB
Condition
Plate, sheet and strip; yield by 0.2 percent offset
Condition A (Annealed), hot-finished or cold-finished, all sizes (first row printed)
Typical Applications
ASTM A240/A240M S31803
Pressure vessels and general applications (plate, sheet and strip)
ASTM A276/A276M S31803
Stainless steel bars and shapes (hot-finished or cold-finished)
Can ASTM A240/A240M S31803 Be Substituted With ASTM A276/A276M S31803?
ASTM A240/A240M S31803 and ASTM A276/A276M S31803 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 S31803 and ASTM A276/A276M S31803?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A240/A240M S31803 be substituted with ASTM A276/A276M S31803?
ASTM A240/A240M S31803 and ASTM A276/A276M S31803 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.