Strong Match — 91.5% match
based on chemical composition and mechanical property overlap.
IS 1570 (Part 7) 7Cr18Ni11NbH (IS 1570 (Part 7):1992) and ASTM A959 347 (ASTM A959:2011) are both steel grades.
Both fall under the Stainless Steel category.
IS 1570 (Part 7) 7Cr18Ni11NbH 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 347 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1).
IS 1570 (Part 7) 7Cr18Ni11NbH is defined under Bureau of Indian Standards (IS), originating from India, while ASTM A959 347 is defined under ASTM International, originating from United States.
As per chemical composition, IS 1570 (Part 7) 7Cr18Ni11NbH vs ASTM A959 347 is a 91.5% 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 91.5%.
Frequently Compared With IS 1570 (Part 7) 7Cr18Ni11NbH:
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) 7Cr18Ni11NbH
ASTM A959 347
Tensile Strength
510-710 MPa
Not specified
Yield Strength
>=205 MPa (0.2 % proof stress)
Not specified
Elongation
>=30%
Not specified
Condition
Pipes, bars, forgings, plates, Q, thickness - (first row of Table 3)
Not specified
Typical Applications
IS 1570 (Part 7) 7Cr18Ni11NbH
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
ASTM A959 347
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
IS 1570 (Part 7) 7Cr18Ni11NbH specifies Nb+Ta which is not specified for ASTM A959 347.
Can IS 1570 (Part 7) 7Cr18Ni11NbH Be Substituted With ASTM A959 347?
IS 1570 (Part 7) 7Cr18Ni11NbH and ASTM A959 347 overlap closely enough on chemistry and mechanical properties that ASTM A959 347 is often considered as a substitute for IS 1570 (Part 7) 7Cr18Ni11NbH 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 IS 1570 (Part 7) 7Cr18Ni11NbH and ASTM A959 347?
IS 1570 (Part 7) 7Cr18Ni11NbH specifies Nb+Ta which is not specified for ASTM A959 347.
Can IS 1570 (Part 7) 7Cr18Ni11NbH be substituted with ASTM A959 347?
IS 1570 (Part 7) 7Cr18Ni11NbH and ASTM A959 347 overlap closely enough on chemistry and mechanical properties that ASTM A959 347 is often considered as a substitute for IS 1570 (Part 7) 7Cr18Ni11NbH in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.