Strong Match — 100% match
based on chemical composition and mechanical property overlap.
JIS G4305 SUS631 (JIS G4305:2012) and JIS G4304 SUS631 (JIS G4304:2021) are both steel grades.
Both fall under the Stainless Steel category.
JIS G4305 SUS631 is typically used for cold-rolled stainless steel plates, sheet and strip, while JIS G4304 SUS631 is commonly used for hot-rolled stainless steel plates and strips.
JIS G4305 SUS631 is defined under Japanese Industrial Standards (JIS), originating from Japan, while JIS G4304 SUS631 is defined under Japanese Industrial Standards (JIS), originating from Japan.
As per chemical composition, JIS G4305 SUS631 vs JIS G4304 SUS631 is a 100% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a strong match overall at 100%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
JIS G4305 SUS631
JIS G4304 SUS631
Tensile Strength
<=1030 MPa
<=1030 MPa
Yield Strength
<=380 MPa
<=380 MPa
Hardness
<=192 HB
<=192 HB
Condition
Solution heat treated plate and strip; proof strength applies only when specified by the purchaser
Solution heat treated plate and strip; proof strength applies only when specified by the purchaser
Elongation
Not specified
>=20%
Typical Applications
JIS G4305 SUS631
Cold-rolled stainless steel plates, sheet and strip
JIS G4304 SUS631
Hot-rolled stainless steel plates and strips
Can JIS G4305 SUS631 Be Substituted With JIS G4304 SUS631?
JIS G4305 SUS631 and JIS G4304 SUS631 overlap closely enough on chemistry and mechanical properties that JIS G4304 SUS631 is often considered as a substitute for JIS G4305 SUS631 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 G4305 SUS631 and JIS G4304 SUS631?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can JIS G4305 SUS631 be substituted with JIS G4304 SUS631?
JIS G4305 SUS631 and JIS G4304 SUS631 overlap closely enough on chemistry and mechanical properties that JIS G4304 SUS631 is often considered as a substitute for JIS G4305 SUS631 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.