Minimal Match — 45.9% match
based on chemical composition and mechanical property overlap.
BS 970 EN57 (BS 970:1955) and IS 1570 (Part 7) 11Cr17Ni13W3TiH (IS 1570 (Part 7):1992) are both steel grades.
Both fall under the Stainless Steel category.
BS 970 EN57 is typically used for bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. suitable for tensile strength of 55 tons/sq in min., while IS 1570 (Part 7) 11Cr17Ni13W3TiH is commonly used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature.
BS 970 EN57 is defined under British Standards (BS), originating from United Kingdom, while IS 1570 (Part 7) 11Cr17Ni13W3TiH is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, BS 970 EN57 vs IS 1570 (Part 7) 11Cr17Ni13W3TiH is a 68.8% match.
As per mechanical properties, the match is 0%.
Combined, this makes them a minimal match overall at 45.9%.
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 EN57
IS 1570 (Part 7) 11Cr17Ni13W3TiH
Tensile Strength
≥849 MPa (55 tons/sq in, converted)
600-800 MPa
Yield Strength
≥680 MPa (44 tons/sq in, converted)
>=390 MPa (0.2 % proof stress)
Elongation
≥15%
>=25%
Hardness
248 HB
Not specified
Condition
Hardened and tempered (ruling 6), ruling section 6 in (lowest-strength condition of the standard)
Bars, forgings, pipes, hot cold worked, thickness up to 60 (first row of Table 3)
Typical Applications
BS 970 EN57
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable for tensile strength of 55 tons/sq in min.
IS 1570 (Part 7) 11Cr17Ni13W3TiH
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Key Differences
IS 1570 (Part 7) 11Cr17Ni13W3TiH specifies W, Ti, B which are not specified for BS 970 EN57.
Can BS 970 EN57 Be Substituted With IS 1570 (Part 7) 11Cr17Ni13W3TiH?
BS 970 EN57 and IS 1570 (Part 7) 11Cr17Ni13W3TiH share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
What is the difference between BS 970 EN57 and IS 1570 (Part 7) 11Cr17Ni13W3TiH?
IS 1570 (Part 7) 11Cr17Ni13W3TiH specifies W, Ti, B which are not specified for BS 970 EN57.
Can BS 970 EN57 be substituted with IS 1570 (Part 7) 11Cr17Ni13W3TiH?
BS 970 EN57 and IS 1570 (Part 7) 11Cr17Ni13W3TiH share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.