Strong Match — 87.9% match
based on chemical composition and mechanical property overlap.
IS 6603 X04Cr12 (IS 6603:2024) and BS 970 (Part 1) 410S21 (BS 970 (Part 1):1991) are both steel grades.
Both fall under the Stainless Steel category.
IS 6603 X04Cr12 is typically used for general purposes, semi-finished products, bars, wire rods and bright bars, while BS 970 (Part 1) 410S21 is commonly used for ferritic and martensitic stainless and heat resisting steel (section five).
IS 6603 X04Cr12 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 410S21 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, IS 6603 X04Cr12 vs BS 970 (Part 1) 410S21 is a 87.9% 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 87.9%.
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 X04Cr12
BS 970 (Part 1) 410S21
Tensile Strength
>=400 MPa
Not specified
Yield Strength
>=230 MPa
Not specified
Elongation
>=20%
Not specified
Hardness
<=200 HB
Not specified
Condition
Annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 25 mm; Tensile Strength is a minimum as printed
Not specified
Typical Applications
IS 6603 X04Cr12
General purposes, semi-finished products, bars, wire rods and bright bars
BS 970 (Part 1) 410S21
Ferritic and martensitic stainless and heat resisting steel (section five)
Can IS 6603 X04Cr12 Be Substituted With BS 970 (Part 1) 410S21?
IS 6603 X04Cr12 and BS 970 (Part 1) 410S21 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 410S21 is often considered as a substitute for IS 6603 X04Cr12 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 X04Cr12 and BS 970 (Part 1) 410S21?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 6603 X04Cr12 be substituted with BS 970 (Part 1) 410S21?
IS 6603 X04Cr12 and BS 970 (Part 1) 410S21 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 410S21 is often considered as a substitute for IS 6603 X04Cr12 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.