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IS 1570 (Part 7) 7Cr18Ni10H vs ASTM A959 321H

Strong Match — 91% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 7) 7Cr18Ni10H (IS 1570 (Part 7):1992) and ASTM A959 321H (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. IS 1570 (Part 7) 7Cr18Ni10H 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 321H is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). IS 1570 (Part 7) 7Cr18Ni10H is defined under Bureau of Indian Standards (IS), originating from India, while ASTM A959 321H is defined under ASTM International, originating from United States.

As per chemical composition, IS 1570 (Part 7) 7Cr18Ni10H vs ASTM A959 321H is a 91% 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%.

Frequently Compared With IS 1570 (Part 7) 7Cr18Ni10H:
EN 10088-1 1.4301 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH GOST 5632 06Kh23N28 GOST 5632 08X18H10 EN 10088-1 1.4401 GB/T 3280 06Cr19Ni10 IS 1570 (Part 7) 12Cr12Ni2Mo EN 10088-1 1.4006 ASTM A959 .-
Match Breakdown
CHEMISTRY MATCH
91%
MECHANICAL MATCH
No shared data
OVERALL
91%
Specifications
Property IS 1570 (Part 7) 7Cr18Ni10H ASTM A959 321H
Standard IS 1570 (Part 7):1992 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) 0.04-0.10 0.04-0.10
Si (%) <=0.75 <=1.00
Mn (%) <=2.00 <=2.00
P (%) <=0.045 <=0.045
S (%) <=0.030 <=0.030
Cr (%) 17.00-20.00 17.0-19.0
Ni (%) 8.00-12.00 9.0-12.0
N (%) Not specified <=0.10
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) 7Cr18Ni10H ASTM A959 321H
Tensile Strength 490-690 MPa Not specified
Yield Strength >=195 MPa (0.2 % proof stress) Not specified
Elongation >=30% Not specified
Condition Tubes, forgings, plates, Q, thickness - (first row of Table 3) Not specified
Typical Applications
IS 1570 (Part 7) 7Cr18Ni10H
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
ASTM A959 321H
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can IS 1570 (Part 7) 7Cr18Ni10H Be Substituted With ASTM A959 321H?
IS 1570 (Part 7) 7Cr18Ni10H and ASTM A959 321H overlap closely enough on chemistry and mechanical properties that ASTM A959 321H is often considered as a substitute for IS 1570 (Part 7) 7Cr18Ni10H 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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IS 1570 (Part 7) 7Cr18Ni10H
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ASTM A959 321H
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Frequently Asked Questions
What is the difference between IS 1570 (Part 7) 7Cr18Ni10H and ASTM A959 321H?
ASTM A959 321H specifies N which is not specified for IS 1570 (Part 7) 7Cr18Ni10H.
Can IS 1570 (Part 7) 7Cr18Ni10H be substituted with ASTM A959 321H?
IS 1570 (Part 7) 7Cr18Ni10H and ASTM A959 321H overlap closely enough on chemistry and mechanical properties that ASTM A959 321H is often considered as a substitute for IS 1570 (Part 7) 7Cr18Ni10H in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.