BS 970 (Part 3) 420S37 vs IS 1570 (Part 7) 12Cr13H
Close Alternative — 84.9% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 3) 420S37 (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) 420S37 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) 420S37 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) 420S37 vs IS 1570 (Part 7) 12Cr13H is a 90% 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 3) 420S37
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) 420S37
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) 420S37 Be Substituted With IS 1570 (Part 7) 12Cr13H?
BS 970 (Part 3) 420S37 and IS 1570 (Part 7) 12Cr13H 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 3) 420S37 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) 420S37 be substituted with IS 1570 (Part 7) 12Cr13H?
BS 970 (Part 3) 420S37 and IS 1570 (Part 7) 12Cr13H 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.