Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
IS 1570 (Part 7) 11Cr17Ni13W3TiH (IS 1570 (Part 7):1992) and ASTM A959 .- (ASTM A959:2011) are both steel grades.
Both fall under the Stainless Steel category.
IS 1570 (Part 7) 11Cr17Ni13W3TiH is typically used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature, while ASTM A959 .- is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1).
IS 1570 (Part 7) 11Cr17Ni13W3TiH is defined under Bureau of Indian Standards (IS), originating from India, while ASTM A959 .- is defined under ASTM International, originating from United States.
As per chemical composition, IS 1570 (Part 7) 11Cr17Ni13W3TiH vs ASTM A959 .- is a 55.9% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a minimal match overall at 35%.
Frequently Compared With IS 1570 (Part 7) 11Cr17Ni13W3TiH:
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
IS 1570 (Part 7) 11Cr17Ni13W3TiH
ASTM A959 .-
Tensile Strength
600-800 MPa
Not specified
Yield Strength
>=390 MPa (0.2 % proof stress)
Not specified
Elongation
>=25%
Not specified
Condition
Bars, forgings, pipes, hot cold worked, thickness up to 60 (first row of Table 3)
Not specified
Typical Applications
IS 1570 (Part 7) 11Cr17Ni13W3TiH
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
ASTM A959 .-
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
IS 1570 (Part 7) 11Cr17Ni13W3TiH specifies W, B which are not specified for ASTM A959 .-.
ASTM A959 .- specifies Cb, N which are not specified for IS 1570 (Part 7) 11Cr17Ni13W3TiH.
Can IS 1570 (Part 7) 11Cr17Ni13W3TiH Be Substituted With ASTM A959 .-?
IS 1570 (Part 7) 11Cr17Ni13W3TiH and ASTM A959 .- 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 IS 1570 (Part 7) 11Cr17Ni13W3TiH and ASTM A959 .-?
IS 1570 (Part 7) 11Cr17Ni13W3TiH specifies W, B which are not specified for ASTM A959 .-. ASTM A959 .- specifies Cb, N which are not specified for IS 1570 (Part 7) 11Cr17Ni13W3TiH.
Can IS 1570 (Part 7) 11Cr17Ni13W3TiH be substituted with ASTM A959 .-?
IS 1570 (Part 7) 11Cr17Ni13W3TiH and ASTM A959 .- 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.