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IS 1570 (Part 7) 40CrMoH vs GB/T 3077 12Cr2Ni4A

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 7) 40CrMoH (IS 1570 (Part 7):1992) and GB/T 3077 12Cr2Ni4A (GB/T 3077-2015) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 7) 40CrMoH is typically used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature, while GB/T 3077 12Cr2Ni4A is commonly used for used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.. IS 1570 (Part 7) 40CrMoH is defined under Bureau of Indian Standards (IS), originating from India, while GB/T 3077 12Cr2Ni4A is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, IS 1570 (Part 7) 40CrMoH vs GB/T 3077 12Cr2Ni4A is a 62.6% match. As per mechanical properties, the match is 2%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With IS 1570 (Part 7) 40CrMoH:
IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 10Mo6H IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 12Cr2Mo5V2H IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 12Cr4Mo5H IS 1570 (Part 4) 10Cr20Mo6
Match Breakdown
CHEMISTRY MATCH
62.6%
MECHANICAL MATCH
2%
OVERALL
35%
Specifications
Property IS 1570 (Part 7) 40CrMoH GB/T 3077 12Cr2Ni4A
Standard IS 1570 (Part 7):1992 GB/T 3077-2015
Category Alloy Steel Alloy Steel
C (%) 0.35-0.45 0.10-0.15
Si (%) 0.10-0.35 0.17-0.37
Mn (%) 0.40-0.70 0.30-0.60
P (%) <=0.035 0.025 max
S (%) <=0.035 0.025 max
Cr (%) 1.00-1.50 1.25-1.65
Mo (%) 0.50-0.80 Not specified
Ni (%) Not specified 3.25-3.75
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) 40CrMoH GB/T 3077 12Cr2Ni4A
Tensile Strength 850-1000 MPa 980-1180 MPa
Yield Strength >=635 MPa (0.2 % proof stress) 785-980 MPa
Elongation >=14% 10-14%
Condition Bars, forgings, Q+T, thickness up to 200 (first row of Table 3) Not specified
Hardness Not specified 58-62 HRC (case)
Typical Applications
IS 1570 (Part 7) 40CrMoH
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
GB/T 3077 12Cr2Ni4A
Used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.
Key Differences
Can IS 1570 (Part 7) 40CrMoH Be Substituted With GB/T 3077 12Cr2Ni4A?
IS 1570 (Part 7) 40CrMoH and GB/T 3077 12Cr2Ni4A 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.
Forms & Sizes Available on M-EX
IS 1570 (Part 7) 40CrMoH
No active listings currently.
GB/T 3077 12Cr2Ni4A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–6600 mm (196.85–259.84 in)
On M-EX Right Now
IS 1570 (Part 7) 40CrMoH
0 active listings and RFQs →
GB/T 3077 12Cr2Ni4A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 7) 40CrMoH and GB/T 3077 12Cr2Ni4A?
IS 1570 (Part 7) 40CrMoH specifies Mo which is not specified for GB/T 3077 12Cr2Ni4A. GB/T 3077 12Cr2Ni4A specifies Ni which is not specified for IS 1570 (Part 7) 40CrMoH.
Can IS 1570 (Part 7) 40CrMoH be substituted with GB/T 3077 12Cr2Ni4A?
IS 1570 (Part 7) 40CrMoH and GB/T 3077 12Cr2Ni4A 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.