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