Strong Match — 91.1% match
based on chemical composition and mechanical property overlap.
IS 6603 X04Cr19Ni9 (IS 6603:2024) and ASTM A959 XM-21 (ASTM A959:2011) are both steel grades.
Both fall under the Stainless Steel category.
IS 6603 X04Cr19Ni9 is typically used for general purposes, semi-finished products, bars, wire rods and bright bars, while ASTM A959 XM-21 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1).
IS 6603 X04Cr19Ni9 is defined under Bureau of Indian Standards (IS), originating from India, while ASTM A959 XM-21 is defined under ASTM International, originating from United States.
As per chemical composition, IS 6603 X04Cr19Ni9 vs ASTM A959 XM-21 is a 91.1% 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 91.1%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
IS 6603 X04Cr19Ni9
ASTM A959 XM-21
Tensile Strength
510-710 MPa
Not specified
Yield Strength
>=200 MPa
Not specified
Elongation
>=40%
Not specified
Condition
Solution annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 160 mm; Yield Strength is Rp0.2, Elongation is A (longitudinal)
Not specified
Typical Applications
IS 6603 X04Cr19Ni9
General purposes, semi-finished products, bars, wire rods and bright bars
ASTM A959 XM-21
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Can IS 6603 X04Cr19Ni9 Be Substituted With ASTM A959 XM-21?
IS 6603 X04Cr19Ni9 and ASTM A959 XM-21 overlap closely enough on chemistry and mechanical properties that ASTM A959 XM-21 is often considered as a substitute for IS 6603 X04Cr19Ni9 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 IS 6603 X04Cr19Ni9 and ASTM A959 XM-21?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 6603 X04Cr19Ni9 be substituted with ASTM A959 XM-21?
IS 6603 X04Cr19Ni9 and ASTM A959 XM-21 overlap closely enough on chemistry and mechanical properties that ASTM A959 XM-21 is often considered as a substitute for IS 6603 X04Cr19Ni9 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.