BS 970 (Part 3) 410S21 vs IS 1570 (Part 7) 12Cr13H
Strong Match — 98.3% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 3) 410S21 (BS 970 (Part 3):1991) and IS 1570 (Part 7) 12Cr13H (IS 1570 (Part 7):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 1570 (Part 7) 12Cr13H is commonly used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature.
BS 970 (Part 3) 410S21 is defined under British Standards (BS), originating from United Kingdom, while IS 1570 (Part 7) 12Cr13H is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, BS 970 (Part 3) 410S21 vs IS 1570 (Part 7) 12Cr13H is a 98.3% 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 98.3%.
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 1570 (Part 7) 12Cr13H
Tensile Strength
Not specified
470-670 MPa
Yield Strength
Not specified
>=265 MPa (0.2 % proof stress)
Elongation
Not specified
>=20%
Condition
Not specified
Bars, forgings, plates, A, thickness up to 160 (first row of Table 3)
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 1570 (Part 7) 12Cr13H
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Can BS 970 (Part 3) 410S21 Be Substituted With IS 1570 (Part 7) 12Cr13H?
BS 970 (Part 3) 410S21 and IS 1570 (Part 7) 12Cr13H overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 7) 12Cr13H 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 1570 (Part 7) 12Cr13H?
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 1570 (Part 7) 12Cr13H?
BS 970 (Part 3) 410S21 and IS 1570 (Part 7) 12Cr13H overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 7) 12Cr13H 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.