Close Alternative — 84.9% match
based on chemical composition and mechanical property overlap.
IS 6603 X15Cr25Ni21Si (IS 6603:2024) and ASTM A959 310S (ASTM A959:2011) are both steel grades.
Both fall under the Stainless Steel category.
IS 6603 X15Cr25Ni21Si is typically used for general purposes, semi-finished products, bars, wire rods and bright bars, while ASTM A959 310S is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1).
IS 6603 X15Cr25Ni21Si is defined under Bureau of Indian Standards (IS), originating from India, while ASTM A959 310S is defined under ASTM International, originating from United States.
As per chemical composition, IS 6603 X15Cr25Ni21Si vs ASTM A959 310S is a 86% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a close alternative overall at 84.9%.
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 X15Cr25Ni21Si
ASTM A959 310S
Tensile Strength
550-750 MPa
Not specified
Yield Strength
>=230 MPa
Not specified
Elongation
>=30%
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 X15Cr25Ni21Si
General purposes, semi-finished products, bars, wire rods and bright bars
ASTM A959 310S
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Can IS 6603 X15Cr25Ni21Si Be Substituted With ASTM A959 310S?
IS 6603 X15Cr25Ni21Si and ASTM A959 310S are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
What is the difference between IS 6603 X15Cr25Ni21Si and ASTM A959 310S?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 6603 X15Cr25Ni21Si be substituted with ASTM A959 310S?
IS 6603 X15Cr25Ni21Si and ASTM A959 310S are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.