Close Alternative — 72.6% match
based on chemical composition and mechanical property overlap.
JIS G4304 SUS315J1 (JIS G4304:2021) and BS 970 (Part 1) 303S31 (BS 970 (Part 1):1983) are both steel grades.
Both fall under the Stainless Steel category.
JIS G4304 SUS315J1 is typically used for hot-rolled stainless steel plates and strips, while BS 970 (Part 1) 303S31 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 SUS315J1 is defined under Japanese Industrial Standards (JIS), originating from Japan, while BS 970 (Part 1) 303S31 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, JIS G4304 SUS315J1 vs BS 970 (Part 1) 303S31 is a 72.6% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a close alternative overall at 72.6%.
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 SUS315J1
BS 970 (Part 1) 303S31
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 SUS315J1
Hot-rolled stainless steel plates and strips
BS 970 (Part 1) 303S31
Austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (Table 14, with Table 15 for the cold drawn condition).
Key Differences
JIS G4304 SUS315J1 specifies Cu which is not specified for BS 970 (Part 1) 303S31.
Can JIS G4304 SUS315J1 Be Substituted With BS 970 (Part 1) 303S31?
JIS G4304 SUS315J1 and BS 970 (Part 1) 303S31 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
What is the difference between JIS G4304 SUS315J1 and BS 970 (Part 1) 303S31?
JIS G4304 SUS315J1 specifies Cu which is not specified for BS 970 (Part 1) 303S31.
Can JIS G4304 SUS315J1 be substituted with BS 970 (Part 1) 303S31?
JIS G4304 SUS315J1 and BS 970 (Part 1) 303S31 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.