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JIS G4304 SUSXM7 vs BS 970 (Part 1) 321S31

Strong Match — 92.5% match based on chemical composition and mechanical property overlap.

JIS G4304 SUSXM7 (JIS G4304:2021) and BS 970 (Part 1) 321S31 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Stainless Steel category. JIS G4304 SUSXM7 is typically used for hot-rolled stainless steel plates and strips, while BS 970 (Part 1) 321S31 is commonly used for austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (table 14, with table 15 for the cold drawn condition).. JIS G4304 SUSXM7 is defined under Japanese Industrial Standards (JIS), originating from Japan, while BS 970 (Part 1) 321S31 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, JIS G4304 SUSXM7 vs BS 970 (Part 1) 321S31 is a 92.5% 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 92.5%.

Frequently Compared With JIS G4304 SUSXM7:
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
92.5%
MECHANICAL MATCH
No shared data
OVERALL
92.5%
Specifications
Property JIS G4304 SUSXM7 BS 970 (Part 1) 321S31
Standard JIS G4304:2021 BS 970 (Part 1):1983
Category Stainless Steel Stainless Steel
C (%) <=0.08 <=0.08
Si (%) <=1.00 <=1.0
Mn (%) <=2.00 <=2.0
P (%) <=0.045 <=0.045
S (%) <=0.030 <=0.030
Ni (%) 8.50-10.50 9.0-12.0
Cr (%) 17.00-19.00 17.0-19.0
Cu (%) 3.00-4.00 Not specified
Ti (%) Not specified 5C-0.80
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 SUSXM7 BS 970 (Part 1) 321S31
Tensile Strength >=450 MPa Not specified
Yield Strength >=155 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 SUSXM7
Hot-rolled stainless steel plates and strips
BS 970 (Part 1) 321S31
Austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (Table 14, with Table 15 for the cold drawn condition).
Key Differences
Can JIS G4304 SUSXM7 Be Substituted With BS 970 (Part 1) 321S31?
JIS G4304 SUSXM7 and BS 970 (Part 1) 321S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 321S31 is often considered as a substitute for JIS G4304 SUSXM7 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 SUSXM7
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BS 970 (Part 1) 321S31
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Frequently Asked Questions
What is the difference between JIS G4304 SUSXM7 and BS 970 (Part 1) 321S31?
JIS G4304 SUSXM7 specifies Cu which is not specified for BS 970 (Part 1) 321S31. BS 970 (Part 1) 321S31 specifies Ti which is not specified for JIS G4304 SUSXM7.
Can JIS G4304 SUSXM7 be substituted with BS 970 (Part 1) 321S31?
JIS G4304 SUSXM7 and BS 970 (Part 1) 321S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 321S31 is often considered as a substitute for JIS G4304 SUSXM7 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.