Close Alternative — 73.6% match
based on chemical composition and mechanical property overlap.
JIS G4304 SUS312L (JIS G4304:2021) and ASTM A240/A240M S31254 (ASTM A240/A240M:2025) are both steel grades.
Both fall under the Stainless Steel category.
JIS G4304 SUS312L is typically used for hot-rolled stainless steel plates and strips, while ASTM A240/A240M S31254 is commonly used for pressure vessels and general applications (plate, sheet and strip).
JIS G4304 SUS312L is defined under Japanese Industrial Standards (JIS), originating from Japan, while ASTM A240/A240M S31254 is defined under ASTM International, originating from United States.
As per chemical composition, JIS G4304 SUS312L vs ASTM A240/A240M S31254 is a 85.3% match.
As per mechanical properties, the match is 50%.
Combined, this makes them a close alternative overall at 73.6%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
JIS G4304 SUS312L
ASTM A240/A240M S31254
Tensile Strength
>=650 MPa
>=690 MPa
Yield Strength
>=300 MPa
>=310 MPa
Elongation
>=35%
>=35%
Hardness
<=223 HB
<=223 HB
Condition
Solution heat treated plate and strip; 0.2 percent proof strength applies only when specified by the purchaser
Sheet and strip (first condition printed); yield by 0.2 percent offset
Typical Applications
JIS G4304 SUS312L
Hot-rolled stainless steel plates and strips
ASTM A240/A240M S31254
Pressure vessels and general applications (plate, sheet and strip)
Can JIS G4304 SUS312L Be Substituted With ASTM A240/A240M S31254?
JIS G4304 SUS312L and ASTM A240/A240M S31254 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 JIS G4304 SUS312L and ASTM A240/A240M S31254?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can JIS G4304 SUS312L be substituted with ASTM A240/A240M S31254?
JIS G4304 SUS312L and ASTM A240/A240M S31254 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.