Strong Match — 95% match
based on chemical composition and mechanical property overlap.
ASTM A959 309H (ASTM A959:2011) and JIS G4305 SUS309S (JIS G4305:2012) are both steel grades.
Both fall under the Stainless Steel category.
ASTM A959 309H is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while JIS G4305 SUS309S is commonly used for cold-rolled stainless steel plates, sheet and strip.
ASTM A959 309H is defined under ASTM International, originating from United States, while JIS G4305 SUS309S is defined under Japanese Industrial Standards (JIS), originating from Japan.
As per chemical composition, ASTM A959 309H vs JIS G4305 SUS309S is a 95% 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 95%.
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 309H
JIS G4305 SUS309S
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 309H
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
JIS G4305 SUS309S
Cold-rolled stainless steel plates, sheet and strip
Can ASTM A959 309H Be Substituted With JIS G4305 SUS309S?
ASTM A959 309H and JIS G4305 SUS309S overlap closely enough on chemistry and mechanical properties that JIS G4305 SUS309S is often considered as a substitute for ASTM A959 309H 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 309H and JIS G4305 SUS309S?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A959 309H be substituted with JIS G4305 SUS309S?
ASTM A959 309H and JIS G4305 SUS309S overlap closely enough on chemistry and mechanical properties that JIS G4305 SUS309S is often considered as a substitute for ASTM A959 309H in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.