Strong Match — 96.7% match
based on chemical composition and mechanical property overlap.
EN 10088-3 X9CrNi18-9 (EN 10088-3:2014) and BS 970 (Part 3) 302S31 (BS 970 (Part 3):1991) are both steel grades.
Both fall under the Stainless Steel category.
EN 10088-3 X9CrNi18-9 is typically used for general purposes, semi-finished products, bars, rods, wire, sections and bright products, while BS 970 (Part 3) 302S31 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 X9CrNi18-9 is defined under European Standard (EN), originating from Europe, while BS 970 (Part 3) 302S31 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, EN 10088-3 X9CrNi18-9 vs BS 970 (Part 3) 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 10088-3 X9CrNi18-9
BS 970 (Part 3) 302S31
Tensile Strength
550-750 MPa
Not specified
Yield Strength
>=190 MPa
Not specified
Elongation
>=40%
Not specified
Hardness
<=215 HB
Not specified
Condition
Solution annealed (+AT), conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 40 mm; Yield Strength is Rp0.2, Elongation is A (longitudinal), hardness for guidance only
Not specified
Typical Applications
EN 10088-3 X9CrNi18-9
General purposes, semi-finished products, bars, rods, wire, sections and bright products
BS 970 (Part 3) 302S31
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)
Can EN 10088-3 X9CrNi18-9 Be Substituted With BS 970 (Part 3) 302S31?
EN 10088-3 X9CrNi18-9 and BS 970 (Part 3) 302S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 302S31 is often considered as a substitute for EN 10088-3 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 10088-3 X9CrNi18-9 and BS 970 (Part 3) 302S31?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can EN 10088-3 X9CrNi18-9 be substituted with BS 970 (Part 3) 302S31?
EN 10088-3 X9CrNi18-9 and BS 970 (Part 3) 302S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 302S31 is often considered as a substitute for EN 10088-3 X9CrNi18-9 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.