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IS 1570 (Part 4) 21Cr4Mo2 vs IS 1570 (Part 7) 12Cr9Mo10H

Minimal Match — 45.7% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 21Cr4Mo2 (IS 1570 (Part 4):1988) and IS 1570 (Part 7) 12Cr9Mo10H (IS 1570 (Part 7):1992) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 21Cr4Mo2 is defined under Bureau of Indian Standards (IS), originating from India, while IS 1570 (Part 7) 12Cr9Mo10H is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 1570 (Part 4) 21Cr4Mo2 vs IS 1570 (Part 7) 12Cr9Mo10H is a 68.5% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 45.7%.

Frequently Compared With IS 1570 (Part 4) 21Cr4Mo2:
IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 12Cr4Mo5H IS 1570 (Part 7) 10Mo6H IS 11169 (Part 1) 12Cr4Mo2 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 12Cr2Mo5V2H NF A35-565 100C6 IS 1570 (Part 4) 103Cr6 GOST 4543 12HN3A IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Mo6 UNI 11234 100Cr6
Match Breakdown
CHEMISTRY MATCH
68.5%
MECHANICAL MATCH
0%
OVERALL
45.7%
Specifications
Property IS 1570 (Part 4) 21Cr4Mo2 IS 1570 (Part 7) 12Cr9Mo10H
Standard IS 1570 (Part 4):1988 IS 1570 (Part 7):1992
Category Alloy Steel Alloy Steel
C (%) <=0.26 0.08-0.15
Si (%) 0.10-0.35 0.10-0.50
Mn (%) 0.60-0.90 0.30-0.70
Cr (%) 0.90-1.20 1.90-2.60
Mo (%) 0.15-0.30 0.90-1.15
P (%) Not specified <=0.040
S (%) Not specified <=0.040
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 IS 1570 (Part 4) 21Cr4Mo2 IS 1570 (Part 7) 12Cr9Mo10H
Tensile Strength 790-990 MPa 410-560 MPa
Yield Strength >=610 MPa >=135 MPa (0.2 % proof stress)
Condition Sheet and strip, hardened and tempered or cold rolled and tempered Pipes, A, thickness - (first row of Table 3)
Typical Applications
IS 1570 (Part 4) 21Cr4Mo2
Not documented
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 IS 1570 (Part 4) 21Cr4Mo2 Be Substituted With IS 1570 (Part 7) 12Cr9Mo10H?
IS 1570 (Part 4) 21Cr4Mo2 and IS 1570 (Part 7) 12Cr9Mo10H share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
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IS 1570 (Part 4) 21Cr4Mo2
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IS 1570 (Part 7) 12Cr9Mo10H
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 21Cr4Mo2 and IS 1570 (Part 7) 12Cr9Mo10H?
IS 1570 (Part 7) 12Cr9Mo10H specifies P, S, Al (metallic) which are not specified for IS 1570 (Part 4) 21Cr4Mo2.
Can IS 1570 (Part 4) 21Cr4Mo2 be substituted with IS 1570 (Part 7) 12Cr9Mo10H?
IS 1570 (Part 4) 21Cr4Mo2 and IS 1570 (Part 7) 12Cr9Mo10H share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.