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BS 970 (Part 1) 303S42 vs BS 970 (Part 1) 303S31

Strong Match — 98.1% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 303S42 (BS 970 (Part 1):1991) and BS 970 (Part 1) 303S31 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Stainless Steel category. BS 970 (Part 1) 303S42 is typically used for austenitic stainless and heat resisting steel (section five), while BS 970 (Part 1) 303S31 is commonly used for austenitic stainless and heat resisting steel (section five). BS 970 (Part 1) 303S42 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 303S31 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 303S42 vs BS 970 (Part 1) 303S31 is a 97.2% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 98.1%.

Frequently Compared With BS 970 (Part 1) 303S42:
ASTM A959 16-8-2H EN 10088-1 1.4301 ASTM A959 .- GOST 5632 06Kh23N28 EN 10088-1 1.4006 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH GB/T 3280 06Cr19Ni10 GOST 5632 08X18H10 IS 1570 (Part 7) 11Cr17Ni13W3TiH
Match Breakdown
CHEMISTRY MATCH
97.2%
MECHANICAL MATCH
100%
OVERALL
98.1%
Specifications
Property BS 970 (Part 1) 303S42 BS 970 (Part 1) 303S31
Standard BS 970 (Part 1):1991 BS 970 (Part 1):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
Mo (%) <=1.00 <=1.00
Ni (%) 8.0-10.0 8.0-10.0
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 (Part 1) 303S42 BS 970 (Part 1) 303S31
Condition Softened, 1000-1100 deg C Softened, 1000-1100 deg C
Tensile Strength 510 MPa min 510 MPa min
Yield Strength 190 MPa min (0.2% proof) 190 MPa min (0.2% proof)
Elongation 40 % min 40 % min
Hardness 183 HB max 183 HB max
Typical Applications
BS 970 (Part 1) 303S42
Austenitic stainless and heat resisting steel (section five)
BS 970 (Part 1) 303S31
Austenitic stainless and heat resisting steel (section five)
Can BS 970 (Part 1) 303S42 Be Substituted With BS 970 (Part 1) 303S31?
BS 970 (Part 1) 303S42 and BS 970 (Part 1) 303S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 303S31 is often considered as a substitute for BS 970 (Part 1) 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 1) 303S42
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BS 970 (Part 1) 303S31
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 303S42 and BS 970 (Part 1) 303S31?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 1) 303S42 be substituted with BS 970 (Part 1) 303S31?
BS 970 (Part 1) 303S42 and BS 970 (Part 1) 303S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 303S31 is often considered as a substitute for BS 970 (Part 1) 303S42 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.