Close Alternative — 75.3% match
based on chemical composition and mechanical property overlap.
EN 10088-3 X7CrNiAl17-7 (EN 10088-3:2014) and BS 970 (Part 3) 304S31 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Stainless Steel category.
EN 10088-3 X7CrNiAl17-7 is typically used for general purposes, semi-finished products, bars, rods, wire, sections and bright products, while BS 970 (Part 3) 304S31 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).
EN 10088-3 X7CrNiAl17-7 is defined under European Standard (EN), originating from Europe, while BS 970 (Part 3) 304S31 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, EN 10088-3 X7CrNiAl17-7 vs BS 970 (Part 3) 304S31 is a 75.3% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a close alternative overall at 75.3%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
EN 10088-3 X7CrNiAl17-7
BS 970 (Part 3) 304S31
Tensile Strength
<=850 MPa
Not specified
Hardness
<=255 HB
Not specified
Condition
Solution annealed (+AT), conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 30 mm; hardness for guidance only
Not specified
Typical Applications
EN 10088-3 X7CrNiAl17-7
General purposes, semi-finished products, bars, rods, wire, sections and bright products
BS 970 (Part 3) 304S31
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
EN 10088-3 X7CrNiAl17-7 specifies Al which is not specified for BS 970 (Part 3) 304S31.
Can EN 10088-3 X7CrNiAl17-7 Be Substituted With BS 970 (Part 3) 304S31?
EN 10088-3 X7CrNiAl17-7 and BS 970 (Part 3) 304S31 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
What is the difference between EN 10088-3 X7CrNiAl17-7 and BS 970 (Part 3) 304S31?
EN 10088-3 X7CrNiAl17-7 specifies Al which is not specified for BS 970 (Part 3) 304S31.
Can EN 10088-3 X7CrNiAl17-7 be substituted with BS 970 (Part 3) 304S31?
EN 10088-3 X7CrNiAl17-7 and BS 970 (Part 3) 304S31 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.