Strong Match — 96.1% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 1) 310S31 (BS 970 (Part 1):1983) and ASTM A240/A240M S31008 (ASTM A240/A240M:2025) are both steel grades.
Both fall under the Stainless Steel category.
BS 970 (Part 1) 310S31 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 ASTM A240/A240M S31008 is commonly used for pressure vessels and general applications (plate, sheet and strip).
BS 970 (Part 1) 310S31 is defined under British Standards (BS), originating from United Kingdom, while ASTM A240/A240M S31008 is defined under ASTM International, originating from United States.
As per chemical composition, BS 970 (Part 1) 310S31 vs ASTM A240/A240M S31008 is a 96.1% 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 96.1%.
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) 310S31
ASTM A240/A240M S31008
Tensile Strength
Not specified
>=515 MPa
Yield Strength
Not specified
>=205 MPa
Elongation
Not specified
>=40%
Hardness
Not specified
<=217 HB
Condition
Not specified
Plate, sheet and strip; yield by 0.2 percent offset
Typical Applications
BS 970 (Part 1) 310S31
Austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (Table 14, with Table 15 for the cold drawn condition).
ASTM A240/A240M S31008
Pressure vessels and general applications (plate, sheet and strip)
Can BS 970 (Part 1) 310S31 Be Substituted With ASTM A240/A240M S31008?
BS 970 (Part 1) 310S31 and ASTM A240/A240M S31008 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M S31008 is often considered as a substitute for BS 970 (Part 1) 310S31 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between BS 970 (Part 1) 310S31 and ASTM A240/A240M S31008?
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) 310S31 be substituted with ASTM A240/A240M S31008?
BS 970 (Part 1) 310S31 and ASTM A240/A240M S31008 overlap closely enough on chemistry and mechanical properties that ASTM A240/A240M S31008 is often considered as a substitute for BS 970 (Part 1) 310S31 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.