Strong Match — 92.8% match
based on chemical composition and mechanical property overlap.
ASTM A959 XM-21 (ASTM A959:2011) and IS 6911 X04Cr19Ni9 (IS 6911:1992) 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 6911 X04Cr19Ni9 is commonly used for used in food equipment, chemical processing units, kitchenware, tanks, piping, and architectural applications..
ASTM A959 XM-21 is defined under ASTM International, originating from United States, while IS 6911 X04Cr19Ni9 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, ASTM A959 XM-21 vs IS 6911 X04Cr19Ni9 is a 92.8% 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 92.8%.
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 6911 X04Cr19Ni9
Bend Test (180 deg)
Not specified
Not required
Elongation (50 mm, annealed)
Not specified
>=40%
Hardness (annealed, max)
Not specified
192 HBS, 92 HRB
Tensile Strength (annealed)
Not specified
>=400 MPa
Yield Strength (0.2% proof, annealed)
Not specified
>=200 MPa
Typical Applications
ASTM A959 XM-21
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
IS 6911 X04Cr19Ni9
Used in food equipment, chemical processing units, kitchenware, tanks, piping, and architectural applications.
Key Differences
ASTM A959 XM-21 specifies N which is not specified for IS 6911 X04Cr19Ni9.
Can ASTM A959 XM-21 Be Substituted With IS 6911 X04Cr19Ni9?
ASTM A959 XM-21 and IS 6911 X04Cr19Ni9 overlap closely enough on chemistry and mechanical properties that IS 6911 X04Cr19Ni9 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 6911 X04Cr19Ni9?
ASTM A959 XM-21 specifies N which is not specified for IS 6911 X04Cr19Ni9.
Can ASTM A959 XM-21 be substituted with IS 6911 X04Cr19Ni9?
ASTM A959 XM-21 and IS 6911 X04Cr19Ni9 overlap closely enough on chemistry and mechanical properties that IS 6911 X04Cr19Ni9 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.