Post Stock Login Register

GB/T 3077 40CrNiMoA vs GOST 4543 12HN3A

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

GB/T 3077 40CrNiMoA (GB/T 3077-2015) and GOST 4543 12HN3A (GOST 4543-2016) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 40CrNiMoA is typically used for used for crankshafts, turbine shafts, heavy-duty gears, aircraft landing parts, bolts, and pressure components., while GOST 4543 12HN3A is commonly used for used for gears, pinions, crankshafts, aircraft parts, and transmission components.. GB/T 3077 40CrNiMoA is defined under Guobiao Standards (GB/T) (China).

As per chemical composition, GB/T 3077 40CrNiMoA vs GOST 4543 12HN3A is a 66.9% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GB/T 3077 40CrNiMoA:
GB/T 3077 12Cr2Ni4A UNI 11234 100Cr6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
66.9%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property GB/T 3077 40CrNiMoA GOST 4543 12HN3A
Standard GB/T 3077-2015 GOST 4543-2016
Category Alloy Steel Alloy Steel
C (%) 0.37-0.44 0.09-0.16
Si (%) 0.17-0.37 0.17-0.37
Mn (%) 0.50-0.80 0.3-0.6
Cr (%) 0.60-0.90 0.6-0.9
Ni (%) 1.25-1.65 2.75-3.15
Mo (%) 0.15-0.25 Not specified
P (%) 0.025 max Not specified
S (%) 0.025 max Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property GB/T 3077 40CrNiMoA GOST 4543 12HN3A
Tensile Strength 1080-1280 MPa 850-1050 MPa
Yield Strength 930-1080 MPa 685 MPa min
Elongation 10-14% 11% min
Hardness 30-38 HRC 58-62 HRC (case)
Typical Applications
GB/T 3077 40CrNiMoA
Used for crankshafts, turbine shafts, heavy-duty gears, aircraft landing parts, bolts, and pressure components.
GOST 4543 12HN3A
Used for gears, pinions, crankshafts, aircraft parts, and transmission components.
Key Differences
Can GB/T 3077 40CrNiMoA Be Substituted With GOST 4543 12HN3A?
GB/T 3077 40CrNiMoA and GOST 4543 12HN3A 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
GB/T 3077 40CrNiMoA
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4200–7000 mm (165.35–275.59 in)
GOST 4543 12HN3A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5600–6600 mm (220.47–259.84 in)
On M-EX Right Now
GB/T 3077 40CrNiMoA
2 active listings and RFQs →
GOST 4543 12HN3A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 3077 40CrNiMoA and GOST 4543 12HN3A?
GB/T 3077 40CrNiMoA specifies Mo, P, S which are not specified for GOST 4543 12HN3A.
Can GB/T 3077 40CrNiMoA be substituted with GOST 4543 12HN3A?
GB/T 3077 40CrNiMoA and GOST 4543 12HN3A 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.