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ASTM A240/A240M S32615 vs BS 970 (Part 3) 316S31

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S32615 (ASTM A240/A240M:2025) and BS 970 (Part 3) 316S31 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Stainless Steel category. ASTM A240/A240M S32615 is typically used for pressure vessels and general applications (plate, sheet and strip), while BS 970 (Part 3) 316S31 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). ASTM A240/A240M S32615 is defined under ASTM International, originating from United States, while BS 970 (Part 3) 316S31 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, ASTM A240/A240M S32615 vs BS 970 (Part 3) 316S31 is a 72.2% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With ASTM A240/A240M S32615:
GOST 5632 08X18H10 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo IS 1570 (Part 7) 12Cr13H ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28
Match Breakdown
CHEMISTRY MATCH
72.2%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property ASTM A240/A240M S32615 BS 970 (Part 3) 316S31
Standard ASTM A240/A240M:2025 BS 970 (Part 3):1991
Category Stainless Steel Stainless Steel
C (%) <=0.07 <=0.07
Mn (%) <=2.00 <=2.0
P (%) <=0.045 <=0.045
S (%) <=0.030 <=0.030
Si (%) 4.80-6.00 <=1.0
Cr (%) 16.5-19.5 16.5-18.5
Ni (%) 19.0-22.0 10.5-13.5
Mo (%) 0.30-1.50 2.00-2.50
Cu (%) 1.50-2.50 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 ASTM A240/A240M S32615 BS 970 (Part 3) 316S31
Tensile Strength >=550 MPa Not specified
Yield Strength >=220 MPa Not specified
Elongation >=25% Not specified
Condition Plate, sheet and strip; yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S32615
Pressure vessels and general applications (plate, sheet and strip)
BS 970 (Part 3) 316S31
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 ASTM A240/A240M S32615 Be Substituted With BS 970 (Part 3) 316S31?
ASTM A240/A240M S32615 and BS 970 (Part 3) 316S31 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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ASTM A240/A240M S32615
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BS 970 (Part 3) 316S31
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S32615 and BS 970 (Part 3) 316S31?
ASTM A240/A240M S32615 specifies Cu which is not specified for BS 970 (Part 3) 316S31.
Can ASTM A240/A240M S32615 be substituted with BS 970 (Part 3) 316S31?
ASTM A240/A240M S32615 and BS 970 (Part 3) 316S31 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.