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BS 970 (Part 1) 303S42 vs JIS G4304 SUS303

Strong Match — 90.3% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 303S42 (BS 970 (Part 1):1983) and JIS G4304 SUS303 (JIS G4304:2021) are both steel grades. Both fall under the Stainless Steel category. BS 970 (Part 1) 303S42 is typically used for austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (table 14, with table 15 for the cold drawn condition)., while JIS G4304 SUS303 is commonly used for hot-rolled stainless steel plates and strips. BS 970 (Part 1) 303S42 is defined under British Standards (BS), originating from United Kingdom, while JIS G4304 SUS303 is defined under Japanese Industrial Standards (JIS), originating from Japan.

As per chemical composition, BS 970 (Part 1) 303S42 vs JIS G4304 SUS303 is a 90.3% 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 90.3%.

Frequently Compared With BS 970 (Part 1) 303S42:
IS 1570 (Part 7) 12Cr12Ni2Mo EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12MoH GOST 5632 08X18H10 EN 10088-1 1.4006 EN 10088-1 1.4301 GB/T 3280 06Cr19Ni10 EN 10088-1 1.4401 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr13H ASTM A959 .-
Match Breakdown
CHEMISTRY MATCH
90.3%
MECHANICAL MATCH
No shared data
OVERALL
90.3%
Specifications
Property BS 970 (Part 1) 303S42 JIS G4304 SUS303
Standard BS 970 (Part 1):1983 JIS G4304:2021
Category Stainless Steel Stainless Steel
C (%) <=0.12 <=0.15
Si (%) <=1.0 <=1.00
Mn (%) <=2.0 <=2.00
P (%) <=0.060 <=0.20
S (%) <=0.060 >=0.15
Cr (%) 17.0-19.0 17.00-19.00
Mo (%) <=1.00 <=0.60
Ni (%) 8.0-10.0 8.00-10.00
Se (%) 0.15-0.35 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 BS 970 (Part 1) 303S42 JIS G4304 SUS303
Tensile Strength Not specified >=520 MPa
Yield Strength Not specified >=205 MPa
Elongation Not specified >=35%
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
BS 970 (Part 1) 303S42
Austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (Table 14, with Table 15 for the cold drawn condition).
JIS G4304 SUS303
Hot-rolled stainless steel plates and strips
Key Differences
Can BS 970 (Part 1) 303S42 Be Substituted With JIS G4304 SUS303?
BS 970 (Part 1) 303S42 and JIS G4304 SUS303 overlap closely enough on chemistry and mechanical properties that JIS G4304 SUS303 is often considered as a substitute for BS 970 (Part 1) 303S42 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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BS 970 (Part 1) 303S42
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JIS G4304 SUS303
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 303S42 and JIS G4304 SUS303?
BS 970 (Part 1) 303S42 specifies Se which is not specified for JIS G4304 SUS303.
Can BS 970 (Part 1) 303S42 be substituted with JIS G4304 SUS303?
BS 970 (Part 1) 303S42 and JIS G4304 SUS303 overlap closely enough on chemistry and mechanical properties that JIS G4304 SUS303 is often considered as a substitute for BS 970 (Part 1) 303S42 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.