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ASTM A387/A387M Grade 22 vs IS 1570 (Part 7) 12Cr9Mo10H

Close Alternative — 72.8% match based on chemical composition and mechanical property overlap.

ASTM A387/A387M Grade 22 (ASTM A387/A387M:2011) and IS 1570 (Part 7) 12Cr9Mo10H (IS 1570 (Part 7):1992) are both steel grades. Both fall under the Alloy Steel category. ASTM A387/A387M Grade 22 is typically used for welded boilers and pressure vessels for elevated temperature service, while IS 1570 (Part 7) 12Cr9Mo10H is commonly used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature. ASTM A387/A387M Grade 22 is defined under ASTM International, originating from United States, while IS 1570 (Part 7) 12Cr9Mo10H is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, ASTM A387/A387M Grade 22 vs IS 1570 (Part 7) 12Cr9Mo10H is a 88.6% match. As per mechanical properties, the match is 41.4%. Combined, this makes them a close alternative overall at 72.8%.

Frequently Compared With ASTM A387/A387M Grade 22:
EN 10028-2 10CrMo9-10 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
88.6%
MECHANICAL MATCH
41.4%
OVERALL
72.8%
Specifications
Property ASTM A387/A387M Grade 22 IS 1570 (Part 7) 12Cr9Mo10H
Standard ASTM A387/A387M:2011 IS 1570 (Part 7):1992
Category Alloy Steel Alloy Steel
C (%) 0.05-0.15 0.08-0.15
Mn (%) 0.30-0.60 0.30-0.70
P (%) <=0.025 <=0.040
S (%) <=0.025 <=0.040
Si (%) <=0.50 0.10-0.50
Cr (%) 2.00-2.50 1.90-2.60
Mo (%) 0.90-1.10 0.90-1.15
Al (metallic) (%) Not specified <=0.02
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A387/A387M Grade 22 IS 1570 (Part 7) 12Cr9Mo10H
Tensile Strength 415-585 MPa 410-560 MPa
Yield Strength >=205 MPa >=135 MPa (0.2 % proof stress)
Elongation >=18% Not specified
Condition Class 1 plates, no thickness ranges printed; elongation in 50 mm gauge length Pipes, A, thickness - (first row of Table 3)
Typical Applications
ASTM A387/A387M Grade 22
Welded boilers and pressure vessels for elevated temperature service
IS 1570 (Part 7) 12Cr9Mo10H
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
Key Differences
Can ASTM A387/A387M Grade 22 Be Substituted With IS 1570 (Part 7) 12Cr9Mo10H?
ASTM A387/A387M Grade 22 and IS 1570 (Part 7) 12Cr9Mo10H are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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ASTM A387/A387M Grade 22
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IS 1570 (Part 7) 12Cr9Mo10H
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Frequently Asked Questions
What is the difference between ASTM A387/A387M Grade 22 and IS 1570 (Part 7) 12Cr9Mo10H?
IS 1570 (Part 7) 12Cr9Mo10H specifies Al (metallic) which is not specified for ASTM A387/A387M Grade 22.
Can ASTM A387/A387M Grade 22 be substituted with IS 1570 (Part 7) 12Cr9Mo10H?
ASTM A387/A387M Grade 22 and IS 1570 (Part 7) 12Cr9Mo10H are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.