Strong Match — 94.9% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 3) 410S21 (BS 970 (Part 3):1991) and IS 6603 X12Cr13 (IS 6603:2024) are both steel grades.
Both fall under the Stainless Steel category.
BS 970 (Part 3) 410S21 is typically used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; martensitic stainless steel (table 17), while IS 6603 X12Cr13 is commonly used for general purposes, semi-finished products, bars, wire rods and bright bars.
BS 970 (Part 3) 410S21 is defined under British Standards (BS), originating from United Kingdom, while IS 6603 X12Cr13 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, BS 970 (Part 3) 410S21 vs IS 6603 X12Cr13 is a 94.9% 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 94.9%.
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 3) 410S21
IS 6603 X12Cr13
Tensile Strength
Not specified
<=730 MPa
Hardness
Not specified
<=223 HB
Condition
Not specified
Soft annealed (+A), conditions 1C, 1E, 1D, 1X, 1G and 2D, all sizes; hardness as printed
Typical Applications
BS 970 (Part 3) 410S21
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; martensitic stainless steel (Table 17)
IS 6603 X12Cr13
General purposes, semi-finished products, bars, wire rods and bright bars
Can BS 970 (Part 3) 410S21 Be Substituted With IS 6603 X12Cr13?
BS 970 (Part 3) 410S21 and IS 6603 X12Cr13 overlap closely enough on chemistry and mechanical properties that IS 6603 X12Cr13 is often considered as a substitute for BS 970 (Part 3) 410S21 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 3) 410S21 and IS 6603 X12Cr13?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 3) 410S21 be substituted with IS 6603 X12Cr13?
BS 970 (Part 3) 410S21 and IS 6603 X12Cr13 overlap closely enough on chemistry and mechanical properties that IS 6603 X12Cr13 is often considered as a substitute for BS 970 (Part 3) 410S21 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.