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BS 970 (Part 3) 303S42 vs BS 970 (Part 3) 303S31

Strong Match — 97.2% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 303S42 (BS 970 (Part 3):1991) and BS 970 (Part 3) 303S31 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Stainless Steel category. BS 970 (Part 3) 303S42 is typically used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; austenitic stainless and heat resisting steel (table 18), while BS 970 (Part 3) 303S31 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; austenitic stainless and heat resisting steel (table 18). BS 970 (Part 3) 303S42 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 3) 303S31 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 3) 303S42 vs BS 970 (Part 3) 303S31 is a 97.2% 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 97.2%.

Frequently Compared With BS 970 (Part 3) 303S42:
EN 10088-1 1.4845 GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 IS 1570 (Part 7) 12Cr12Ni2Mo ASTM A959 .- GOST 5632 08X18H10 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4401 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH
Match Breakdown
CHEMISTRY MATCH
97.2%
MECHANICAL MATCH
No shared data
OVERALL
97.2%
Specifications
Property BS 970 (Part 3) 303S42 BS 970 (Part 3) 303S31
Standard BS 970 (Part 3):1991 BS 970 (Part 3):1991
Category Stainless Steel Stainless Steel
C (%) <=0.12 <=0.12
Si (%) <=1.0 <=1.0
Mn (%) <=2.0 <=2.0
P (%) <=0.060 <=0.060
S (%) <=0.060 0.15-0.35
Cr (%) 17.0-19.0 17.0-19.0
Ni (%) 8.0-10.0 8.0-10.0
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.
Typical Applications
BS 970 (Part 3) 303S42
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; austenitic stainless and heat resisting steel (Table 18)
BS 970 (Part 3) 303S31
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; austenitic stainless and heat resisting steel (Table 18)
Key Differences
Can BS 970 (Part 3) 303S42 Be Substituted With BS 970 (Part 3) 303S31?
BS 970 (Part 3) 303S42 and BS 970 (Part 3) 303S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 303S31 is often considered as a substitute for BS 970 (Part 3) 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 3) 303S42
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BS 970 (Part 3) 303S31
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Frequently Asked Questions
What is the difference between BS 970 (Part 3) 303S42 and BS 970 (Part 3) 303S31?
BS 970 (Part 3) 303S42 specifies Se which is not specified for BS 970 (Part 3) 303S31.
Can BS 970 (Part 3) 303S42 be substituted with BS 970 (Part 3) 303S31?
BS 970 (Part 3) 303S42 and BS 970 (Part 3) 303S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 303S31 is often considered as a substitute for BS 970 (Part 3) 303S42 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.