Strong Match — 92.3% match
based on chemical composition and mechanical property overlap.
ASTM A959 XM-21 (ASTM A959:2011) and JIS G4304 SUS304N1 (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 SUS304N1 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 SUS304N1 is defined under Japanese Industrial Standards (JIS), originating from Japan.
As per chemical composition, ASTM A959 XM-21 vs JIS G4304 SUS304N1 is a 92.3% 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 92.3%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
ASTM A959 XM-21
JIS G4304 SUS304N1
Tensile Strength
Not specified
>=550 MPa
Yield Strength
Not specified
>=275 MPa
Elongation
Not specified
>=35%
Hardness
Not specified
<=217 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 SUS304N1
Hot-rolled stainless steel plates and strips
Can ASTM A959 XM-21 Be Substituted With JIS G4304 SUS304N1?
ASTM A959 XM-21 and JIS G4304 SUS304N1 overlap closely enough on chemistry and mechanical properties that JIS G4304 SUS304N1 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 SUS304N1?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A959 XM-21 be substituted with JIS G4304 SUS304N1?
ASTM A959 XM-21 and JIS G4304 SUS304N1 overlap closely enough on chemistry and mechanical properties that JIS G4304 SUS304N1 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.