Strong Match — 98.8% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 3) 410S21 (BS 970 (Part 3):1991) and IS 6911 X12Cr12 (IS 6911:1992) 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 6911 X12Cr12 is commonly used for stainless and heat-resisting steel plate, sheet and strip (clause 1.1).
BS 970 (Part 3) 410S21 is defined under British Standards (BS), originating from United Kingdom, while IS 6911 X12Cr12 is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, BS 970 (Part 3) 410S21 vs IS 6911 X12Cr12 is a 98.8% 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 98.8%.
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 6911 X12Cr12
Elongation (50 mm, annealed)
Not specified
>=16%
Hardness (annealed, max)
Not specified
212 HBS, 95 HRB
Tensile Strength (annealed)
Not specified
>=590 MPa
Yield Strength (0.2% proof, annealed)
Not specified
>=410 MPa
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 6911 X12Cr12
Stainless and heat-resisting steel plate, sheet and strip (clause 1.1)
Can BS 970 (Part 3) 410S21 Be Substituted With IS 6911 X12Cr12?
BS 970 (Part 3) 410S21 and IS 6911 X12Cr12 overlap closely enough on chemistry and mechanical properties that IS 6911 X12Cr12 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 6911 X12Cr12?
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 6911 X12Cr12?
BS 970 (Part 3) 410S21 and IS 6911 X12Cr12 overlap closely enough on chemistry and mechanical properties that IS 6911 X12Cr12 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.