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JIS G4304 SUS304Cu vs ASTM A959 304H

Strong Match — 90.8% match based on chemical composition and mechanical property overlap.

JIS G4304 SUS304Cu (JIS G4304:2021) and ASTM A959 304H (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 304H is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). JIS G4304 SUS304Cu is defined under Japanese Industrial Standards (JIS), originating from Japan, while ASTM A959 304H is defined under ASTM International, originating from United States.

As per chemical composition, JIS G4304 SUS304Cu vs ASTM A959 304H is a 90.8% 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 90.8%.

Frequently Compared With JIS G4304 SUS304Cu:
ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 GOST 5632 08X18H10 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo
Match Breakdown
CHEMISTRY MATCH
90.8%
MECHANICAL MATCH
No shared data
OVERALL
90.8%
Specifications
Property JIS G4304 SUS304Cu ASTM A959 304H
Standard JIS G4304:2021 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.08 0.04-0.10
Si (%) <=1.00 <=1.00
Mn (%) <=2.00 <=2.00
P (%) <=0.045 <=0.045
S (%) <=0.030 <=0.030
Ni (%) 8.00-10.50 8.0-11.0
Cr (%) 18.00-20.00 18.0-20.0
Cu (%) 0.70-1.30 Not specified
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 304H
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 304H
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can JIS G4304 SUS304Cu Be Substituted With ASTM A959 304H?
JIS G4304 SUS304Cu and ASTM A959 304H overlap closely enough on chemistry and mechanical properties that ASTM A959 304H 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.
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JIS G4304 SUS304Cu
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ASTM A959 304H
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Frequently Asked Questions
What is the difference between JIS G4304 SUS304Cu and ASTM A959 304H?
JIS G4304 SUS304Cu specifies Cu which is not specified for ASTM A959 304H.
Can JIS G4304 SUS304Cu be substituted with ASTM A959 304H?
JIS G4304 SUS304Cu and ASTM A959 304H overlap closely enough on chemistry and mechanical properties that ASTM A959 304H 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.