Strong Match — 93.4% match
based on chemical composition and mechanical property overlap.
EN 10088-3 X9CrNi18-9 (EN 10088-3:2014) and ASTM A959 303 (ASTM A959:2011) 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 ASTM A959 303 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1).
EN 10088-3 X9CrNi18-9 is defined under European Standard (EN), originating from Europe, while ASTM A959 303 is defined under ASTM International, originating from United States.
As per chemical composition, EN 10088-3 X9CrNi18-9 vs ASTM A959 303 is a 93.4% 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 93.4%.
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
ASTM A959 303
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
ASTM A959 303
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Can EN 10088-3 X9CrNi18-9 Be Substituted With ASTM A959 303?
EN 10088-3 X9CrNi18-9 and ASTM A959 303 overlap closely enough on chemistry and mechanical properties that ASTM A959 303 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 ASTM A959 303?
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 ASTM A959 303?
EN 10088-3 X9CrNi18-9 and ASTM A959 303 overlap closely enough on chemistry and mechanical properties that ASTM A959 303 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.