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IS 1570 (Part 7) 12Cr4Mo5H vs ASTM A387/A387M Grade 12

Close Alternative — 74.1% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 7) 12Cr4Mo5H (IS 1570 (Part 7):1992) and ASTM A387/A387M Grade 12 (ASTM A387/A387M:2011) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 7) 12Cr4Mo5H is typically used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature, while ASTM A387/A387M Grade 12 is commonly used for welded boilers and pressure vessels for elevated temperature service. IS 1570 (Part 7) 12Cr4Mo5H is defined under Bureau of Indian Standards (IS), originating from India, while ASTM A387/A387M Grade 12 is defined under ASTM International, originating from United States.

As per chemical composition, IS 1570 (Part 7) 12Cr4Mo5H vs ASTM A387/A387M Grade 12 is a 85.7% match. As per mechanical properties, the match is 50.8%. Combined, this makes them a close alternative overall at 74.1%.

Frequently Compared With IS 1570 (Part 7) 12Cr4Mo5H:
IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 12Cr2Mo5V2H NF A35-565 100C6 IS 1570 (Part 7) 12Cr9Mo10H IS 1570 (Part 7) 10Mo6H IS 1570 (Part 4) 103Cr4 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 105Cr5 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 UNI 11234 100Cr6 IS 1570 (Part 4) 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
85.7%
MECHANICAL MATCH
50.8%
OVERALL
74.1%
Specifications
Property IS 1570 (Part 7) 12Cr4Mo5H ASTM A387/A387M Grade 12
Standard IS 1570 (Part 7):1992 ASTM A387/A387M:2011
Category Alloy Steel Alloy Steel
C (%) 0.10-0.18 0.05-0.17
Si (%) 0.10-0.35 0.15-0.40
Mn (%) 0.40-0.70 0.40-0.65
P (%) <=0.040 <=0.025
Cr (%) 0.70-1.10 0.80-1.15
Mo (%) 0.45-0.65 0.45-0.60
Al (metallic) (%) <=0.02 Not specified
S (%) Not specified <=0.025
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) 12Cr4Mo5H ASTM A387/A387M Grade 12
Tensile Strength 440-590 MPa 380-550 MPa
Yield Strength >=275 MPa (0.2 % proof stress) >=230 MPa
Elongation >=22% >=22%
Condition Pipes, N+T, thickness - (first row of Table 3) Class 1 plates, no thickness ranges printed; elongation in 50 mm gauge length
Typical Applications
IS 1570 (Part 7) 12Cr4Mo5H
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
ASTM A387/A387M Grade 12
Welded boilers and pressure vessels for elevated temperature service
Key Differences
Can IS 1570 (Part 7) 12Cr4Mo5H Be Substituted With ASTM A387/A387M Grade 12?
IS 1570 (Part 7) 12Cr4Mo5H and ASTM A387/A387M Grade 12 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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IS 1570 (Part 7) 12Cr4Mo5H
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ASTM A387/A387M Grade 12
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Frequently Asked Questions
What is the difference between IS 1570 (Part 7) 12Cr4Mo5H and ASTM A387/A387M Grade 12?
IS 1570 (Part 7) 12Cr4Mo5H specifies Al (metallic) which is not specified for ASTM A387/A387M Grade 12. ASTM A387/A387M Grade 12 specifies S which is not specified for IS 1570 (Part 7) 12Cr4Mo5H.
Can IS 1570 (Part 7) 12Cr4Mo5H be substituted with ASTM A387/A387M Grade 12?
IS 1570 (Part 7) 12Cr4Mo5H and ASTM A387/A387M Grade 12 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.