Strong Match — 91.5% match
based on chemical composition and mechanical property overlap.
JIS G4304 SUS304Cu (JIS G4304:2021) and ASTM A959 SS304 (ASTM A959:2011) are both steel grades.
Both fall under the Stainless Steel category.
JIS G4304 SUS304Cu is typically used for hot-rolled stainless steel plates and strips, while ASTM A959 SS304 is commonly used for food processing, chemical equipment, kitchen equipment.
JIS G4304 SUS304Cu is defined under Japanese Industrial Standards (JIS), originating from Japan, while ASTM A959 SS304 is defined under ASTM International, originating from United States.
As per chemical composition, JIS G4304 SUS304Cu vs ASTM A959 SS304 is a 91.5% 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 91.5%.
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 SUS304Cu
ASTM A959 SS304
Tensile Strength
>=520 MPa
Not specified
Yield Strength
>=205 MPa
Not specified
Elongation
>=40%
Not specified
Hardness
<=187 HB
Not specified
Condition
Solution heat treated plate and strip; 0.2 percent proof strength applies only when specified by the purchaser
Not specified
Typical Applications
JIS G4304 SUS304Cu
Hot-rolled stainless steel plates and strips
ASTM A959 SS304
Food processing, chemical equipment, kitchen equipment
Key Differences
JIS G4304 SUS304Cu specifies Cu which is not specified for ASTM A959 SS304.
Can JIS G4304 SUS304Cu Be Substituted With ASTM A959 SS304?
JIS G4304 SUS304Cu and ASTM A959 SS304 overlap closely enough on chemistry and mechanical properties that ASTM A959 SS304 is often considered as a substitute for JIS G4304 SUS304Cu 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 JIS G4304 SUS304Cu and ASTM A959 SS304?
JIS G4304 SUS304Cu specifies Cu which is not specified for ASTM A959 SS304.
Can JIS G4304 SUS304Cu be substituted with ASTM A959 SS304?
JIS G4304 SUS304Cu and ASTM A959 SS304 overlap closely enough on chemistry and mechanical properties that ASTM A959 SS304 is often considered as a substitute for JIS G4304 SUS304Cu in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.