Strong Match — 89.8% match
based on chemical composition and mechanical property overlap.
IS 6603 X20Cr13 (IS 6603:2024) and ASTM A959 420 (ASTM A959:2011) are both steel grades.
Both fall under the Stainless Steel category.
IS 6603 X20Cr13 is typically used for general purposes, semi-finished products, bars, wire rods and bright bars, while ASTM A959 420 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1).
IS 6603 X20Cr13 is defined under Bureau of Indian Standards (IS), originating from India, while ASTM A959 420 is defined under ASTM International, originating from United States.
As per chemical composition, IS 6603 X20Cr13 vs ASTM A959 420 is a 89.8% 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 89.8%.
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 X20Cr13
ASTM A959 420
Tensile Strength
<=900 MPa
Not specified
Hardness
<=230 HB
Not specified
Condition
Soft annealed (+A), conditions 1C, 1E, 1D, 1X, 1G and 2D, all sizes; hardness as printed
Not specified
Typical Applications
IS 6603 X20Cr13
General purposes, semi-finished products, bars, wire rods and bright bars
ASTM A959 420
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Can IS 6603 X20Cr13 Be Substituted With ASTM A959 420?
IS 6603 X20Cr13 and ASTM A959 420 overlap closely enough on chemistry and mechanical properties that ASTM A959 420 is often considered as a substitute for IS 6603 X20Cr13 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 X20Cr13 and ASTM A959 420?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 6603 X20Cr13 be substituted with ASTM A959 420?
IS 6603 X20Cr13 and ASTM A959 420 overlap closely enough on chemistry and mechanical properties that ASTM A959 420 is often considered as a substitute for IS 6603 X20Cr13 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.