Strong Match — 91.7% match
based on chemical composition and mechanical property overlap.
IS 6603 X15Cr25Ni21Si (IS 6603:2024) and ASTM A959 SS310 (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 SS310 is commonly used for furnace parts, heat exchangers, kiln components.
IS 6603 X15Cr25Ni21Si is defined under Bureau of Indian Standards (IS), originating from India, while ASTM A959 SS310 is defined under ASTM International, originating from United States.
As per chemical composition, IS 6603 X15Cr25Ni21Si vs ASTM A959 SS310 is a 91.7% 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 91.7%.
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 SS310
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 SS310
Furnace parts, heat exchangers, kiln components
Can IS 6603 X15Cr25Ni21Si Be Substituted With ASTM A959 SS310?
IS 6603 X15Cr25Ni21Si and ASTM A959 SS310 overlap closely enough on chemistry and mechanical properties that ASTM A959 SS310 is often considered as a substitute for IS 6603 X15Cr25Ni21Si 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 X15Cr25Ni21Si and ASTM A959 SS310?
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 SS310?
IS 6603 X15Cr25Ni21Si and ASTM A959 SS310 overlap closely enough on chemistry and mechanical properties that ASTM A959 SS310 is often considered as a substitute for IS 6603 X15Cr25Ni21Si in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.