Strong Match — 93.7% match
based on chemical composition and mechanical property overlap.
ASTM A959 XM-21 (ASTM A959:2011) and IS 6603 X05Cr19Ni9N (IS 6603:2024) are both steel grades.
Both fall under the Stainless Steel category.
ASTM A959 XM-21 is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while IS 6603 X05Cr19Ni9N is commonly used for general purposes, semi-finished products, bars, wire rods and bright bars.
ASTM A959 XM-21 is defined under ASTM International, originating from United States, while IS 6603 X05Cr19Ni9N is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, ASTM A959 XM-21 vs IS 6603 X05Cr19Ni9N is a 93.7% 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 93.7%.
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 XM-21
IS 6603 X05Cr19Ni9N
Tensile Strength
Not specified
550-750 MPa
Yield Strength
Not specified
>=270 MPa
Elongation
Not specified
>=40%
Condition
Not specified
Solution annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 40 mm; Yield Strength is Rp0.2, Elongation is A (longitudinal)
Typical Applications
ASTM A959 XM-21
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
IS 6603 X05Cr19Ni9N
General purposes, semi-finished products, bars, wire rods and bright bars
Can ASTM A959 XM-21 Be Substituted With IS 6603 X05Cr19Ni9N?
ASTM A959 XM-21 and IS 6603 X05Cr19Ni9N overlap closely enough on chemistry and mechanical properties that IS 6603 X05Cr19Ni9N is often considered as a substitute for ASTM A959 XM-21 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 XM-21 and IS 6603 X05Cr19Ni9N?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A959 XM-21 be substituted with IS 6603 X05Cr19Ni9N?
ASTM A959 XM-21 and IS 6603 X05Cr19Ni9N overlap closely enough on chemistry and mechanical properties that IS 6603 X05Cr19Ni9N is often considered as a substitute for ASTM A959 XM-21 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.