Close Alternative — 84.9% match
based on chemical composition and mechanical property overlap.
IS 6603 X06Cr18Ni9Cu2S (IS 6603:2024) and BS 970 (Part 1) 303S42 (BS 970 (Part 1):1983) are both steel grades.
Both fall under the Stainless Steel category.
IS 6603 X06Cr18Ni9Cu2S is typically used for general purposes, semi-finished products, bars, wire rods and bright bars, while BS 970 (Part 1) 303S42 is commonly used for austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (table 14, with table 15 for the cold drawn condition)..
IS 6603 X06Cr18Ni9Cu2S is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 303S42 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, IS 6603 X06Cr18Ni9Cu2S vs BS 970 (Part 1) 303S42 is a 84.9% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a close alternative overall at 84.9%.
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 X06Cr18Ni9Cu2S
BS 970 (Part 1) 303S42
Tensile Strength
500-710 MPa
Not specified
Yield Strength
>=185 MPa
Not specified
Elongation
>=35%
Not specified
Condition
Solution annealed, conditions 1C, 1E, 1D, 1X, 1G and 2D, thickness or diameter up to 160 mm; Yield Strength is Rp0.2, Elongation is A (longitudinal)
Not specified
Typical Applications
IS 6603 X06Cr18Ni9Cu2S
General purposes, semi-finished products, bars, wire rods and bright bars
BS 970 (Part 1) 303S42
Austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (Table 14, with Table 15 for the cold drawn condition).
Key Differences
IS 6603 X06Cr18Ni9Cu2S specifies N, Cu which are not specified for BS 970 (Part 1) 303S42.
BS 970 (Part 1) 303S42 specifies Se which is not specified for IS 6603 X06Cr18Ni9Cu2S.
Can IS 6603 X06Cr18Ni9Cu2S Be Substituted With BS 970 (Part 1) 303S42?
IS 6603 X06Cr18Ni9Cu2S and BS 970 (Part 1) 303S42 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
What is the difference between IS 6603 X06Cr18Ni9Cu2S and BS 970 (Part 1) 303S42?
IS 6603 X06Cr18Ni9Cu2S specifies N, Cu which are not specified for BS 970 (Part 1) 303S42. BS 970 (Part 1) 303S42 specifies Se which is not specified for IS 6603 X06Cr18Ni9Cu2S.
Can IS 6603 X06Cr18Ni9Cu2S be substituted with BS 970 (Part 1) 303S42?
IS 6603 X06Cr18Ni9Cu2S and BS 970 (Part 1) 303S42 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.