Close Alternative — 84.9% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 1) 303S42 (BS 970 (Part 1):1983) and IS 6603 X06Cr18Ni9Cu2S (IS 6603:2024) are both steel grades.
Both fall under the Stainless Steel category.
BS 970 (Part 1) 303S42 is typically used for austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (table 14, with table 15 for the cold drawn condition)., while IS 6603 X06Cr18Ni9Cu2S is commonly used for general purposes, semi-finished products, bars, wire rods and bright bars.
BS 970 (Part 1) 303S42 is defined under British Standards (BS), originating from United Kingdom, while IS 6603 X06Cr18Ni9Cu2S is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, BS 970 (Part 1) 303S42 vs IS 6603 X06Cr18Ni9Cu2S 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
BS 970 (Part 1) 303S42
IS 6603 X06Cr18Ni9Cu2S
Tensile Strength
Not specified
500-710 MPa
Yield Strength
Not specified
>=185 MPa
Elongation
Not specified
>=35%
Condition
Not specified
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)
Typical Applications
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).
IS 6603 X06Cr18Ni9Cu2S
General purposes, semi-finished products, bars, wire rods and bright bars
Key Differences
BS 970 (Part 1) 303S42 specifies Se which is not specified for IS 6603 X06Cr18Ni9Cu2S.
IS 6603 X06Cr18Ni9Cu2S specifies N, Cu which are not specified for BS 970 (Part 1) 303S42.
Can BS 970 (Part 1) 303S42 Be Substituted With IS 6603 X06Cr18Ni9Cu2S?
BS 970 (Part 1) 303S42 and IS 6603 X06Cr18Ni9Cu2S 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 BS 970 (Part 1) 303S42 and IS 6603 X06Cr18Ni9Cu2S?
BS 970 (Part 1) 303S42 specifies Se which is not specified for IS 6603 X06Cr18Ni9Cu2S. IS 6603 X06Cr18Ni9Cu2S specifies N, Cu which are not specified for BS 970 (Part 1) 303S42.
Can BS 970 (Part 1) 303S42 be substituted with IS 6603 X06Cr18Ni9Cu2S?
BS 970 (Part 1) 303S42 and IS 6603 X06Cr18Ni9Cu2S 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.