Strong Match — 92.8% match
based on chemical composition and mechanical property overlap.
ASTM A959 XM-21 (ASTM A959:2011) and JIS G4304 SUS304 (JIS G4304:2021) are both steel grades.
Both fall under the Stainless Steel category.
ASTM A959 XM-21 is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while JIS G4304 SUS304 is commonly used for hot-rolled stainless steel plates and strips.
ASTM A959 XM-21 is defined under ASTM International, originating from United States, while JIS G4304 SUS304 is defined under Japanese Industrial Standards (JIS), originating from Japan.
As per chemical composition, ASTM A959 XM-21 vs JIS G4304 SUS304 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 XM-21
JIS G4304 SUS304
Tensile Strength
Not specified
>=520 MPa
Yield Strength
Not specified
>=205 MPa
Elongation
Not specified
>=40%
Hardness
Not specified
<=187 HB
Condition
Not specified
Solution heat treated plate and strip; 0.2 percent proof strength applies only when specified by the purchaser
Typical Applications
ASTM A959 XM-21
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
JIS G4304 SUS304
Hot-rolled stainless steel plates and strips
Key Differences
ASTM A959 XM-21 specifies N which is not specified for JIS G4304 SUS304.
Can ASTM A959 XM-21 Be Substituted With JIS G4304 SUS304?
ASTM A959 XM-21 and JIS G4304 SUS304 overlap closely enough on chemistry and mechanical properties that JIS G4304 SUS304 is often considered as a substitute for ASTM A959 XM-21 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 XM-21 and JIS G4304 SUS304?
ASTM A959 XM-21 specifies N which is not specified for JIS G4304 SUS304.
Can ASTM A959 XM-21 be substituted with JIS G4304 SUS304?
ASTM A959 XM-21 and JIS G4304 SUS304 overlap closely enough on chemistry and mechanical properties that JIS G4304 SUS304 is often considered as a substitute for ASTM A959 XM-21 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.