Strong Match — 96.1% match
based on chemical composition and mechanical property overlap.
IS 6603 X07Cr17Ni7Al (IS 6603:2024) and ASTM A959 631 (ASTM A959:2011) are both steel grades.
Both fall under the Stainless Steel category.
IS 6603 X07Cr17Ni7Al is typically used for general purposes, semi-finished products, bars, wire rods and bright bars, while ASTM A959 631 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1).
IS 6603 X07Cr17Ni7Al is defined under Bureau of Indian Standards (IS), originating from India, while ASTM A959 631 is defined under ASTM International, originating from United States.
As per chemical composition, IS 6603 X07Cr17Ni7Al vs ASTM A959 631 is a 96.1% 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 96.1%.
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 X07Cr17Ni7Al
ASTM A959 631
Tensile Strength
<=850 MPa
Not specified
Hardness
<=255 HB
Not specified
Condition
Solution annealed (+AT), conditions 1C, 1E, 1D, 1X, 1G and 2D; hardness as printed
Not specified
Typical Applications
IS 6603 X07Cr17Ni7Al
General purposes, semi-finished products, bars, wire rods and bright bars
ASTM A959 631
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Can IS 6603 X07Cr17Ni7Al Be Substituted With ASTM A959 631?
IS 6603 X07Cr17Ni7Al and ASTM A959 631 overlap closely enough on chemistry and mechanical properties that ASTM A959 631 is often considered as a substitute for IS 6603 X07Cr17Ni7Al 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 X07Cr17Ni7Al and ASTM A959 631?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 6603 X07Cr17Ni7Al be substituted with ASTM A959 631?
IS 6603 X07Cr17Ni7Al and ASTM A959 631 overlap closely enough on chemistry and mechanical properties that ASTM A959 631 is often considered as a substitute for IS 6603 X07Cr17Ni7Al in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.