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ASTM A240/A240M S20910 vs BS 970 (Part 3) 316S31

Related Material — 58.2% match based on chemical composition and mechanical property overlap.

ASTM A240/A240M S20910 (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 S20910 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 S20910 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 S20910 vs BS 970 (Part 3) 316S31 is a 58.2% 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 58.2%.

Frequently Compared With ASTM A240/A240M S20910:
GOST 5632 08X18H10 EN 10088-1 1.4301 EN 10088-1 1.4401 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 06Kh23N28 EN 10088-1 1.4006 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH
Match Breakdown
CHEMISTRY MATCH
58.2%
MECHANICAL MATCH
No shared data
OVERALL
58.2%
Specifications
Property ASTM A240/A240M S20910 BS 970 (Part 3) 316S31
Standard ASTM A240/A240M:2025 BS 970 (Part 3):1991
Category Stainless Steel Stainless Steel
C (%) <=0.06 <=0.07
Mn (%) 4.00-6.00 <=2.0
P (%) <=0.040 <=0.045
S (%) <=0.030 <=0.030
Si (%) <=0.75 <=1.0
Cr (%) 20.5-23.5 16.5-18.5
Ni (%) 11.5-13.5 10.5-13.5
Mo (%) 1.50-3.00 2.00-2.50
N (%) 0.20-0.40 Not specified
Nb (%) 0.10-0.30 Not specified
V (%) 0.10-0.30 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 S20910 BS 970 (Part 3) 316S31
Tensile Strength >=725 MPa Not specified
Yield Strength >=415 MPa Not specified
Elongation >=30% Not specified
Hardness <=241 HB Not specified
Condition Sheet and strip (first condition printed); yield by 0.2 percent offset Not specified
Typical Applications
ASTM A240/A240M S20910
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 S20910 Be Substituted With BS 970 (Part 3) 316S31?
ASTM A240/A240M S20910 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.
On M-EX Right Now
ASTM A240/A240M S20910
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BS 970 (Part 3) 316S31
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Frequently Asked Questions
What is the difference between ASTM A240/A240M S20910 and BS 970 (Part 3) 316S31?
ASTM A240/A240M S20910 specifies N, Nb, V which are not specified for BS 970 (Part 3) 316S31.
Can ASTM A240/A240M S20910 be substituted with BS 970 (Part 3) 316S31?
ASTM A240/A240M S20910 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.