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ASTM A959 321H vs IS 1570 (Part 7) 7Cr18Ni11NbH

Strong Match — 93.8% match based on chemical composition and mechanical property overlap.

ASTM A959 321H (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 321H 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 321H 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 321H vs IS 1570 (Part 7) 7Cr18Ni11NbH is a 93.8% 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 93.8%.

Frequently Compared With ASTM A959 321H:
EN 10088-1 1.4845 EN 10088-1 1.4006 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12Ni2Mo GOST 5632 06Kh23N28 GOST 5632 08X18H10 EN 10088-1 1.4401 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr13H ASTM A959 .- EN 10088-1 1.4301
Match Breakdown
CHEMISTRY MATCH
93.8%
MECHANICAL MATCH
No shared data
OVERALL
93.8%
Specifications
Property ASTM A959 321H IS 1570 (Part 7) 7Cr18Ni11NbH
Standard ASTM A959:2011 IS 1570 (Part 7):1992
Category Stainless Steel Stainless Steel
C (%) 0.04-0.10 0.04-0.10
Cr (%) 17.0-19.0 17.00-19.00
Mn (%) <=2.00 <=2.00
N (%) <=0.10 Not specified
Ni (%) 9.0-12.0 9.00-13.00
P (%) <=0.045 <=0.045
S (%) <=0.030 <=0.030
Si (%) <=1.00 <=0.75
Nb+Ta (%) Not specified >=10xC, <=1.00
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 321H 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 321H
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
Can ASTM A959 321H Be Substituted With IS 1570 (Part 7) 7Cr18Ni11NbH?
ASTM A959 321H 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 321H in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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ASTM A959 321H
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IS 1570 (Part 7) 7Cr18Ni11NbH
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Frequently Asked Questions
What is the difference between ASTM A959 321H and IS 1570 (Part 7) 7Cr18Ni11NbH?
ASTM A959 321H specifies N which is not specified for IS 1570 (Part 7) 7Cr18Ni11NbH. IS 1570 (Part 7) 7Cr18Ni11NbH specifies Nb+Ta which is not specified for ASTM A959 321H.
Can ASTM A959 321H be substituted with IS 1570 (Part 7) 7Cr18Ni11NbH?
ASTM A959 321H 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 321H in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.