Strong Match — 92.5% match
based on chemical composition and mechanical property overlap.
EN 10088-1 X8CrNiS18-9 (EN 10088-1:2023) and BS 970 (Part 3) 303S31 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Stainless Steel category.
EN 10088-1 X8CrNiS18-9 is defined under European Standard (EN), originating from Europe, while BS 970 (Part 3) 303S31 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, EN 10088-1 X8CrNiS18-9 vs BS 970 (Part 3) 303S31 is a 92.5% 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 92.5%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Typical Applications
EN 10088-1 X8CrNiS18-9
Not documented
BS 970 (Part 3) 303S31
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 10088-1 X8CrNiS18-9 specifies N, Cu which are not specified for BS 970 (Part 3) 303S31.
Can EN 10088-1 X8CrNiS18-9 Be Substituted With BS 970 (Part 3) 303S31?
EN 10088-1 X8CrNiS18-9 and BS 970 (Part 3) 303S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 303S31 is often considered as a substitute for EN 10088-1 X8CrNiS18-9 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 EN 10088-1 X8CrNiS18-9 and BS 970 (Part 3) 303S31?
EN 10088-1 X8CrNiS18-9 specifies N, Cu which are not specified for BS 970 (Part 3) 303S31.
Can EN 10088-1 X8CrNiS18-9 be substituted with BS 970 (Part 3) 303S31?
EN 10088-1 X8CrNiS18-9 and BS 970 (Part 3) 303S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 303S31 is often considered as a substitute for EN 10088-1 X8CrNiS18-9 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.