Strong Match — 85.3% match
based on chemical composition and mechanical property overlap.
ASTM A959 440A (ASTM A959:2011) and EN 10088-3 X70CrMo15 (EN 10088-3:2014) are both steel grades.
Both fall under the Stainless Steel category.
ASTM A959 440A is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while EN 10088-3 X70CrMo15 is commonly used for general purposes, semi-finished products, bars, rods, wire, sections and bright products.
ASTM A959 440A is defined under ASTM International, originating from United States, while EN 10088-3 X70CrMo15 is defined under European Standard (EN), originating from Europe.
As per chemical composition, ASTM A959 440A vs EN 10088-3 X70CrMo15 is a 85.3% 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 85.3%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
ASTM A959 440A
EN 10088-3 X70CrMo15
Tensile Strength
Not specified
<=900 MPa
Hardness
Not specified
<=280 HB
Condition
Not specified
Annealed (+A), conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 100 mm; hardness for guidance only
Typical Applications
ASTM A959 440A
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
EN 10088-3 X70CrMo15
General purposes, semi-finished products, bars, rods, wire, sections and bright products
Can ASTM A959 440A Be Substituted With EN 10088-3 X70CrMo15?
ASTM A959 440A and EN 10088-3 X70CrMo15 overlap closely enough on chemistry and mechanical properties that EN 10088-3 X70CrMo15 is often considered as a substitute for ASTM A959 440A 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 ASTM A959 440A and EN 10088-3 X70CrMo15?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A959 440A be substituted with EN 10088-3 X70CrMo15?
ASTM A959 440A and EN 10088-3 X70CrMo15 overlap closely enough on chemistry and mechanical properties that EN 10088-3 X70CrMo15 is often considered as a substitute for ASTM A959 440A in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.