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JIS G4305 SUS630 vs BS 970 (Part 3) 431S29

Close Alternative — 73.6% match based on chemical composition and mechanical property overlap.

JIS G4305 SUS630 (JIS G4305:2012) and BS 970 (Part 3) 431S29 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Stainless Steel category. JIS G4305 SUS630 is typically used for cold-rolled stainless steel plates, sheet and strip, while BS 970 (Part 3) 431S29 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; martensitic stainless steel (table 17). JIS G4305 SUS630 is defined under Japanese Industrial Standards (JIS), originating from Japan, while BS 970 (Part 3) 431S29 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, JIS G4305 SUS630 vs BS 970 (Part 3) 431S29 is a 73.6% 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 73.6%.

Frequently Compared With JIS G4305 SUS630:
ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 08X18H10 EN 10088-1 1.4401 IS 1570 (Part 7) 12Cr13H
Other Stainless Steel Grades to Compare With JIS G4305 SUS630:
GOST 5632 06Kh23N28 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH
Match Breakdown
CHEMISTRY MATCH
73.6%
MECHANICAL MATCH
No shared data
OVERALL
73.6%
Specifications
Property JIS G4305 SUS630 BS 970 (Part 3) 431S29
Standard JIS G4305:2012 BS 970 (Part 3):1991
Category Stainless Steel Stainless Steel
C (%) <=0.07 0.12-0.20
Si (%) <=1.00 <=1.0
Mn (%) <=1.00 <=1.0
P (%) <=0.040 <=0.040
S (%) <=0.030 <=0.030
Ni (%) 3.00-5.00 2.0-3.0
Cr (%) 15.00-17.50 15.0-18.0
Cu (%) 3.00-5.00 Not specified
Nb (%) 0.15-0.45 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 JIS G4305 SUS630 BS 970 (Part 3) 431S29
Hardness <=363 HB Not specified
Condition Solution heat treated plate and strip (no strength values specified; aged conditions are in the blocks) Not specified
Typical Applications
JIS G4305 SUS630
Cold-rolled stainless steel plates, sheet and strip
BS 970 (Part 3) 431S29
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; martensitic stainless steel (Table 17)
Key Differences
Can JIS G4305 SUS630 Be Substituted With BS 970 (Part 3) 431S29?
JIS G4305 SUS630 and BS 970 (Part 3) 431S29 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.
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JIS G4305 SUS630
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BS 970 (Part 3) 431S29
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Frequently Asked Questions
What is the difference between JIS G4305 SUS630 and BS 970 (Part 3) 431S29?
JIS G4305 SUS630 specifies Cu, Nb which are not specified for BS 970 (Part 3) 431S29.
Can JIS G4305 SUS630 be substituted with BS 970 (Part 3) 431S29?
JIS G4305 SUS630 and BS 970 (Part 3) 431S29 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.