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IS 1570 (Part 4) 33Mo6 vs IS 1570 (Part 7) 20Mo5H

Close Alternative — 77.3% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 33Mo6 (IS 1570 (Part 4):1988) and IS 1570 (Part 7) 20Mo5H (IS 1570 (Part 7):1992) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 33Mo6 is defined under Bureau of Indian Standards (IS), originating from India, while IS 1570 (Part 7) 20Mo5H is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 1570 (Part 4) 33Mo6 vs IS 1570 (Part 7) 20Mo5H is a 77.3% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 77.3%.

Frequently Compared With IS 1570 (Part 4) 33Mo6:
IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 07Cr4Mo6 GOST 4543 12HN3A NF A35-565 100C6 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 EN 10028-2 12CrMo9-10
Match Breakdown
CHEMISTRY MATCH
77.3%
MECHANICAL MATCH
No shared data
OVERALL
77.3%
Specifications
Property IS 1570 (Part 4) 33Mo6 IS 1570 (Part 7) 20Mo5H
Standard IS 1570 (Part 4):1988 IS 1570 (Part 7):1992
Category Alloy Steel Alloy Steel
C (%) 0.25-0.40 0.15-0.25
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.40-0.70 0.90-1.40
Ni (%) <=0.30 <=0.30
Cr (%) <=0.25 <=0.30
Mo (%) 0.45-0.65 0.40-0.60
P (%) Not specified <=0.04
S (%) Not specified <=0.04
Al (metallic) (%) Not specified <=0.02
Cu (%) Not specified <=0.30
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) 33Mo6 IS 1570 (Part 7) 20Mo5H
Tensile Strength Not specified 510-660 MPa
Yield Strength Not specified >=355 MPa (0.2 % proof stress)
Elongation Not specified >=21%
Condition Not specified Steel plates, N+T, thickness over 3 to 16 (first row of Table 3)
Typical Applications
IS 1570 (Part 4) 33Mo6
Not documented
IS 1570 (Part 7) 20Mo5H
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) 33Mo6 Be Substituted With IS 1570 (Part 7) 20Mo5H?
IS 1570 (Part 4) 33Mo6 and IS 1570 (Part 7) 20Mo5H 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.
On M-EX Right Now
IS 1570 (Part 4) 33Mo6
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IS 1570 (Part 7) 20Mo5H
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 33Mo6 and IS 1570 (Part 7) 20Mo5H?
IS 1570 (Part 7) 20Mo5H specifies P, S, Al (metallic), Cu which are not specified for IS 1570 (Part 4) 33Mo6.
Can IS 1570 (Part 4) 33Mo6 be substituted with IS 1570 (Part 7) 20Mo5H?
IS 1570 (Part 4) 33Mo6 and IS 1570 (Part 7) 20Mo5H 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.