Strong Match — 96.5% match
based on chemical composition and mechanical property overlap.
ASTM A959 347H (ASTM A959:2011) and IS 1570 (Part 7) 7Cr18Ni11NbH (IS 1570 (Part 7):1992) are both steel grades.
Both fall under the Stainless Steel category.
ASTM A959 347H is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while IS 1570 (Part 7) 7Cr18Ni11NbH is commonly used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature.
ASTM A959 347H is defined under ASTM International, originating from United States, while IS 1570 (Part 7) 7Cr18Ni11NbH is defined under Bureau of Indian Standards (IS), originating from India.
As per chemical composition, ASTM A959 347H vs IS 1570 (Part 7) 7Cr18Ni11NbH is a 96.5% 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 96.5%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
ASTM A959 347H
IS 1570 (Part 7) 7Cr18Ni11NbH
Tensile Strength
Not specified
510-710 MPa
Yield Strength
Not specified
>=205 MPa (0.2 % proof stress)
Elongation
Not specified
>=30%
Condition
Not specified
Pipes, bars, forgings, plates, Q, thickness - (first row of Table 3)
Typical Applications
ASTM A959 347H
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
IS 1570 (Part 7) 7Cr18Ni11NbH
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Key Differences
IS 1570 (Part 7) 7Cr18Ni11NbH specifies Nb+Ta which is not specified for ASTM A959 347H.
Can ASTM A959 347H Be Substituted With IS 1570 (Part 7) 7Cr18Ni11NbH?
ASTM A959 347H and IS 1570 (Part 7) 7Cr18Ni11NbH overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 7) 7Cr18Ni11NbH is often considered as a substitute for ASTM A959 347H 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 ASTM A959 347H and IS 1570 (Part 7) 7Cr18Ni11NbH?
IS 1570 (Part 7) 7Cr18Ni11NbH specifies Nb+Ta which is not specified for ASTM A959 347H.
Can ASTM A959 347H be substituted with IS 1570 (Part 7) 7Cr18Ni11NbH?
ASTM A959 347H and IS 1570 (Part 7) 7Cr18Ni11NbH overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 7) 7Cr18Ni11NbH is often considered as a substitute for ASTM A959 347H in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.