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BS 970 (Part 1) 303S31 vs ASTM A959 XM-2

Strong Match — 85.8% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 303S31 (BS 970 (Part 1):1991) and ASTM A959 XM-2 (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. BS 970 (Part 1) 303S31 is typically used for austenitic stainless and heat resisting steel (section five), while ASTM A959 XM-2 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). BS 970 (Part 1) 303S31 is defined under British Standards (BS), originating from United Kingdom, while ASTM A959 XM-2 is defined under ASTM International, originating from United States.

As per chemical composition, BS 970 (Part 1) 303S31 vs ASTM A959 XM-2 is a 85.8% 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 85.8%.

Frequently Compared With BS 970 (Part 1) 303S31:
GB/T 3280 06Cr19Ni10 EN 10088-1 1.4301 ASTM A959 16-8-2H IS 1570 (Part 7) 12Cr12MoH ASTM A959 .- GOST 5632 06Kh23N28 GOST 5632 08X18H10 EN 10088-1 1.4006 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoVH
Match Breakdown
CHEMISTRY MATCH
85.8%
MECHANICAL MATCH
No shared data
OVERALL
85.8%
Specifications
Property BS 970 (Part 1) 303S31 ASTM A959 XM-2
Standard BS 970 (Part 1):1991 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) <=0.12 <=0.15
Si (%) <=1.0 <=1.00
Mn (%) <=2.0 <=2.00
P (%) <=0.060 <=0.05
S (%) 0.15-0.35 0.11-0.16
Cr (%) 17.0-19.0 17.0-19.0
Mo (%) <=1.00 0.40-0.60
Ni (%) 8.0-10.0 8.0-10.0
Al (%) Not specified 0.60-1.00
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) 303S31 ASTM A959 XM-2
Condition Softened, 1000-1100 deg C Not specified
Tensile Strength 510 MPa min Not specified
Yield Strength 190 MPa min (0.2% proof) Not specified
Elongation 40 % min Not specified
Hardness 183 HB max Not specified
Typical Applications
BS 970 (Part 1) 303S31
Austenitic stainless and heat resisting steel (section five)
ASTM A959 XM-2
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can BS 970 (Part 1) 303S31 Be Substituted With ASTM A959 XM-2?
BS 970 (Part 1) 303S31 and ASTM A959 XM-2 overlap closely enough on chemistry and mechanical properties that ASTM A959 XM-2 is often considered as a substitute for BS 970 (Part 1) 303S31 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) 303S31
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ASTM A959 XM-2
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 303S31 and ASTM A959 XM-2?
ASTM A959 XM-2 specifies Al which is not specified for BS 970 (Part 1) 303S31.
Can BS 970 (Part 1) 303S31 be substituted with ASTM A959 XM-2?
BS 970 (Part 1) 303S31 and ASTM A959 XM-2 overlap closely enough on chemistry and mechanical properties that ASTM A959 XM-2 is often considered as a substitute for BS 970 (Part 1) 303S31 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.