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BS 970 (Part 1) 325S31 vs BS 970 (Part 3) 304S31

Strong Match — 93.8% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 325S31 (BS 970 (Part 1):1983) and BS 970 (Part 3) 304S31 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Stainless Steel category. BS 970 (Part 1) 325S31 is typically used for austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (table 14, with table 15 for the cold drawn condition)., while BS 970 (Part 3) 304S31 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 1) 325S31 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 3) 304S31 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 325S31 vs BS 970 (Part 3) 304S31 is a 93.8% 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 93.8%.

Frequently Compared With BS 970 (Part 1) 325S31:
IS 1570 (Part 7) 11Cr17Ni13W3TiH EN 10088-1 1.4845 EN 10088-1 1.4401 ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 08X18H10 EN 10088-1 1.4006 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12Ni2Mo IS 1570 (Part 7) 12Cr13H GOST 5632 06Kh23N28 EN 10088-1 1.4301
Match Breakdown
CHEMISTRY MATCH
93.8%
MECHANICAL MATCH
No shared data
OVERALL
93.8%
Specifications
Property BS 970 (Part 1) 325S31 BS 970 (Part 3) 304S31
Standard BS 970 (Part 1):1983 BS 970 (Part 3):1991
Category Stainless Steel Stainless Steel
C (%) <=0.12 <=0.07
Si (%) <=1.0 <=1.0
Mn (%) <=2.0 <=2.0
P (%) <=0.045 <=0.045
S (%) 0.15-0.35 <=0.030
Cr (%) 17.0-19.0 17.0-19.0
Ni (%) 8.0-11.0 8.0-11.0
Ti (%) 5C-0.90 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 1) 325S31
Austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (Table 14, with Table 15 for the cold drawn condition).
BS 970 (Part 3) 304S31
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 1) 325S31 Be Substituted With BS 970 (Part 3) 304S31?
BS 970 (Part 1) 325S31 and BS 970 (Part 3) 304S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 304S31 is often considered as a substitute for BS 970 (Part 1) 325S31 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 1) 325S31
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BS 970 (Part 3) 304S31
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 325S31 and BS 970 (Part 3) 304S31?
BS 970 (Part 1) 325S31 specifies Ti which is not specified for BS 970 (Part 3) 304S31.
Can BS 970 (Part 1) 325S31 be substituted with BS 970 (Part 3) 304S31?
BS 970 (Part 1) 325S31 and BS 970 (Part 3) 304S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 304S31 is often considered as a substitute for BS 970 (Part 1) 325S31 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.