Close Alternative — 84.9% match
based on chemical composition and mechanical property overlap.
JIS G4304 SUS420J2 (JIS G4304:2021) and BS 970 (Part 1) 420S29 (BS 970 (Part 1):1991) are both steel grades.
Both fall under the Stainless Steel category.
JIS G4304 SUS420J2 is typically used for hot-rolled stainless steel plates and strips, while BS 970 (Part 1) 420S29 is commonly used for ferritic and martensitic stainless and heat resisting steel (section five).
JIS G4304 SUS420J2 is defined under Japanese Industrial Standards (JIS), originating from Japan, while BS 970 (Part 1) 420S29 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, JIS G4304 SUS420J2 vs BS 970 (Part 1) 420S29 is a 85% 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 84.9%.
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 SUS420J2
BS 970 (Part 1) 420S29
Tensile Strength
>=540 MPa
Not specified
Yield Strength
>=225 MPa
Not specified
Elongation
>=18%
Not specified
Hardness
<=235 HB
Not specified
Condition
Annealed plate and strip; proof strength applies only when specified by the purchaser
Not specified
Typical Applications
JIS G4304 SUS420J2
Hot-rolled stainless steel plates and strips
BS 970 (Part 1) 420S29
Ferritic and martensitic stainless and heat resisting steel (section five)
Can JIS G4304 SUS420J2 Be Substituted With BS 970 (Part 1) 420S29?
JIS G4304 SUS420J2 and BS 970 (Part 1) 420S29 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 SUS420J2 and BS 970 (Part 1) 420S29?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can JIS G4304 SUS420J2 be substituted with BS 970 (Part 1) 420S29?
JIS G4304 SUS420J2 and BS 970 (Part 1) 420S29 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.