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BS 970 EN51 vs JIS G4304 SUS420J2

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

BS 970 EN51 (BS 970:1955) and JIS G4304 SUS420J2 (JIS G4304:2021) are both steel grades. Both fall under the Stainless Steel category. BS 970 EN51 is typically used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars., while JIS G4304 SUS420J2 is commonly used for hot-rolled stainless steel plates and strips. BS 970 EN51 is defined under British Standards (BS), originating from United Kingdom, while JIS G4304 SUS420J2 is defined under Japanese Industrial Standards (JIS), originating from Japan.

As per chemical composition, BS 970 EN51 vs JIS G4304 SUS420J2 is a 70.8% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With BS 970 EN51:
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
70.8%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property BS 970 EN51 JIS G4304 SUS420J2
Standard BS 970:1955 JIS G4304:2021
Category Stainless Steel Stainless Steel
C (%) 0.25-0.35 0.26-0.40
Si (%) 0.10-0.35 <=1.00
Mn (%) 0.35-0.75 <=1.00
Ni (%) 2.75-3.25 <=0.60
Cr (%) <=0.30 12.00-14.00
S (%) <=0.050 <=0.030
P (%) <=0.050 <=0.040
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 EN51 JIS G4304 SUS420J2
Tensile Strength Not specified >=540 MPa
Yield Strength Not specified >=225 MPa
Elongation Not specified >=18%
Hardness Not specified <=235 HB
Condition Not specified Annealed plate and strip; proof strength applies only when specified by the purchaser
Typical Applications
BS 970 EN51
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars.
JIS G4304 SUS420J2
Hot-rolled stainless steel plates and strips
Can BS 970 EN51 Be Substituted With JIS G4304 SUS420J2?
BS 970 EN51 and JIS G4304 SUS420J2 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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BS 970 EN51
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JIS G4304 SUS420J2
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Frequently Asked Questions
What is the difference between BS 970 EN51 and JIS G4304 SUS420J2?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN51 be substituted with JIS G4304 SUS420J2?
BS 970 EN51 and JIS G4304 SUS420J2 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.