Strong Match — 95.1% match
based on chemical composition and mechanical property overlap.
ASTM A959 303 (ASTM A959:2011) and IS 6911 X07Cr18Ni9 (IS 6911:1992) are both steel grades.
Both fall under the Stainless Steel category.
ASTM A959 303 is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while IS 6911 X07Cr18Ni9 is commonly used for stainless and heat-resisting steel plate, sheet and strip (clause 1.1).
ASTM A959 303 is defined under ASTM International, originating from United States, while IS 6911 X07Cr18Ni9 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, ASTM A959 303 vs IS 6911 X07Cr18Ni9 is a 95.1% 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 95.1%.
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 303
IS 6911 X07Cr18Ni9
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
>=210 MPa
Typical Applications
ASTM A959 303
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
IS 6911 X07Cr18Ni9
Stainless and heat-resisting steel plate, sheet and strip (clause 1.1)
Can ASTM A959 303 Be Substituted With IS 6911 X07Cr18Ni9?
ASTM A959 303 and IS 6911 X07Cr18Ni9 overlap closely enough on chemistry and mechanical properties that IS 6911 X07Cr18Ni9 is often considered as a substitute for ASTM A959 303 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 303 and IS 6911 X07Cr18Ni9?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A959 303 be substituted with IS 6911 X07Cr18Ni9?
ASTM A959 303 and IS 6911 X07Cr18Ni9 overlap closely enough on chemistry and mechanical properties that IS 6911 X07Cr18Ni9 is often considered as a substitute for ASTM A959 303 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.