Strong Match — 95.6% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 1) 403S17 (BS 970 (Part 1):1991) and IS 6603 X04Cr12 (IS 6603:2024) are both steel grades.
Both fall under the Stainless Steel category.
BS 970 (Part 1) 403S17 is typically used for ferritic and martensitic stainless and heat resisting steel (section five), while IS 6603 X04Cr12 is commonly used for general purposes, semi-finished products, bars, wire rods and bright bars.
BS 970 (Part 1) 403S17 is defined under British Standards (BS), originating from United Kingdom, while IS 6603 X04Cr12 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, BS 970 (Part 1) 403S17 vs IS 6603 X04Cr12 is a 95.6% 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 95.6%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
BS 970 (Part 1) 403S17
IS 6603 X04Cr12
Tensile Strength
Not specified
>=400 MPa
Yield Strength
Not specified
>=230 MPa
Elongation
Not specified
>=20%
Hardness
Not specified
<=200 HB
Condition
Not specified
Annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 25 mm; Tensile Strength is a minimum as printed
Typical Applications
BS 970 (Part 1) 403S17
Ferritic and martensitic stainless and heat resisting steel (section five)
IS 6603 X04Cr12
General purposes, semi-finished products, bars, wire rods and bright bars
Can BS 970 (Part 1) 403S17 Be Substituted With IS 6603 X04Cr12?
BS 970 (Part 1) 403S17 and IS 6603 X04Cr12 overlap closely enough on chemistry and mechanical properties that IS 6603 X04Cr12 is often considered as a substitute for BS 970 (Part 1) 403S17 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 BS 970 (Part 1) 403S17 and IS 6603 X04Cr12?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 1) 403S17 be substituted with IS 6603 X04Cr12?
BS 970 (Part 1) 403S17 and IS 6603 X04Cr12 overlap closely enough on chemistry and mechanical properties that IS 6603 X04Cr12 is often considered as a substitute for BS 970 (Part 1) 403S17 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.