Strong Match — 96.7% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 3) 302S31 (BS 970 (Part 3):1991) and EN 10088-3 X9CrNi18-9 (EN 10088-3:2014) are both steel grades.
Both fall under the Stainless Steel category.
BS 970 (Part 3) 302S31 is typically 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), while EN 10088-3 X9CrNi18-9 is commonly used for general purposes, semi-finished products, bars, rods, wire, sections and bright products.
BS 970 (Part 3) 302S31 is defined under British Standards (BS), originating from United Kingdom, while EN 10088-3 X9CrNi18-9 is defined under European Standard (EN), originating from Europe.
As per chemical composition, BS 970 (Part 3) 302S31 vs EN 10088-3 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 3) 302S31
EN 10088-3 X9CrNi18-9
Tensile Strength
Not specified
550-750 MPa
Yield Strength
Not specified
>=190 MPa
Elongation
Not specified
>=40%
Hardness
Not specified
<=215 HB
Condition
Not specified
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
Typical Applications
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)
EN 10088-3 X9CrNi18-9
General purposes, semi-finished products, bars, rods, wire, sections and bright products
Can BS 970 (Part 3) 302S31 Be Substituted With EN 10088-3 X9CrNi18-9?
BS 970 (Part 3) 302S31 and EN 10088-3 X9CrNi18-9 overlap closely enough on chemistry and mechanical properties that EN 10088-3 X9CrNi18-9 is often considered as a substitute for BS 970 (Part 3) 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 3) 302S31 and EN 10088-3 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 3) 302S31 be substituted with EN 10088-3 X9CrNi18-9?
BS 970 (Part 3) 302S31 and EN 10088-3 X9CrNi18-9 overlap closely enough on chemistry and mechanical properties that EN 10088-3 X9CrNi18-9 is often considered as a substitute for BS 970 (Part 3) 302S31 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.