Strong Match — 96.7% match
based on chemical composition and mechanical property overlap.
EN 10088-1 X9CrNi18-9 (EN 10088-1:2023) and BS 970 (Part 1) 302S31 (BS 970 (Part 1):1991) are both steel grades.
Both fall under the Stainless Steel category.
EN 10088-1 X9CrNi18-9 is defined under European Standard (EN), originating from Europe, while BS 970 (Part 1) 302S31 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, EN 10088-1 X9CrNi18-9 vs BS 970 (Part 1) 302S31 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
EN 10088-1 X9CrNi18-9
BS 970 (Part 1) 302S31
Condition
Not specified
Softened, 1000-1100 deg C
Tensile Strength
Not specified
510 MPa min
Yield Strength
Not specified
190 MPa min (0.2% proof)
Elongation
Not specified
40 % min
Hardness
Not specified
183 HB max
Typical Applications
EN 10088-1 X9CrNi18-9
Not documented
BS 970 (Part 1) 302S31
Austenitic stainless and heat resisting steel (section five)
Can EN 10088-1 X9CrNi18-9 Be Substituted With BS 970 (Part 1) 302S31?
EN 10088-1 X9CrNi18-9 and BS 970 (Part 1) 302S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 302S31 is often considered as a substitute for EN 10088-1 X9CrNi18-9 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 X9CrNi18-9 and BS 970 (Part 1) 302S31?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can EN 10088-1 X9CrNi18-9 be substituted with BS 970 (Part 1) 302S31?
EN 10088-1 X9CrNi18-9 and BS 970 (Part 1) 302S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 302S31 is often considered as a substitute for EN 10088-1 X9CrNi18-9 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.