Strong Match — 96.7% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 1) 302S31 (BS 970 (Part 1):1991) and EN 10088-1 X9CrNi18-9 (EN 10088-1:2014) are both steel grades.
Both fall under the Stainless Steel category.
BS 970 (Part 1) 302S31 is defined under British Standards (BS), originating from United Kingdom, while EN 10088-1 X9CrNi18-9 is defined under European Standard (EN), originating from Europe.
As per chemical composition, BS 970 (Part 1) 302S31 vs EN 10088-1 X9CrNi18-9 is a 96.7% 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 96.7%.
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) 302S31
EN 10088-1 X9CrNi18-9
Condition
Softened, 1000-1100 deg C
Not specified
Tensile Strength
510 MPa min
Not specified
Yield Strength
190 MPa min (0.2% proof)
Not specified
Elongation
40 % min
Not specified
Hardness
183 HB max
Not specified
Typical Applications
BS 970 (Part 1) 302S31
Austenitic stainless and heat resisting steel (section five)
EN 10088-1 X9CrNi18-9
Not documented
Can BS 970 (Part 1) 302S31 Be Substituted With EN 10088-1 X9CrNi18-9?
BS 970 (Part 1) 302S31 and EN 10088-1 X9CrNi18-9 overlap closely enough on chemistry and mechanical properties that EN 10088-1 X9CrNi18-9 is often considered as a substitute for BS 970 (Part 1) 302S31 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) 302S31 and EN 10088-1 X9CrNi18-9?
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) 302S31 be substituted with EN 10088-1 X9CrNi18-9?
BS 970 (Part 1) 302S31 and EN 10088-1 X9CrNi18-9 overlap closely enough on chemistry and mechanical properties that EN 10088-1 X9CrNi18-9 is often considered as a substitute for BS 970 (Part 1) 302S31 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.