Post Stock Login Register

GOST 4543 40X vs GB/T 3077 12Cr2Ni4A

Minimal Match — 52.1% match based on chemical composition and mechanical property overlap.

GOST 4543 40X (GOST 4543-2016) and GB/T 3077 12Cr2Ni4A (GB/T 3077-2015) are both steel grades. Both fall under the Alloy Steel category. GOST 4543 40X is typically used for gears, shafts, axles, spindles, studs, automotive components, while GB/T 3077 12Cr2Ni4A is commonly used for used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.. GB/T 3077 12Cr2Ni4A is defined under Guobiao Standards (GB/T) (China).

As per chemical composition, GOST 4543 40X vs GB/T 3077 12Cr2Ni4A is a 65.7% match. As per mechanical properties, the match is 25%. Combined, this makes them a minimal match overall at 52.1%.

Frequently Compared With GOST 4543 40X:
GOST 4543 12HN3A NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Cr36Mo10H EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
65.7%
MECHANICAL MATCH
25%
OVERALL
52.1%
Specifications
Property GOST 4543 40X GB/T 3077 12Cr2Ni4A
Standard GOST 4543-2016 GB/T 3077-2015
Category Alloy Steel Alloy Steel
C (%) 0.36-0.44 0.10-0.15
Si (%) 0.17-0.37 0.17-0.37
Mn (%) 0.50-0.80 0.30-0.60
S (%) <=0.035 0.025 max
P (%) <=0.035 0.025 max
Cr (%) 0.80-1.10 1.25-1.65
Ni (%) <=0.30 3.25-3.75
Cu (%) <=0.30 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 GOST 4543 40X GB/T 3077 12Cr2Ni4A
Tensile Strength 980-1180 MPa 980-1180 MPa
Yield Strength >=785 MPa 785-980 MPa
Elongation >=10% 10-14%
Hardness 229-285 HB 58-62 HRC (case)
Typical Applications
GOST 4543 40X
gears, shafts, axles, spindles, studs, automotive components
GB/T 3077 12Cr2Ni4A
Used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.
Key Differences
Can GOST 4543 40X Be Substituted With GB/T 3077 12Cr2Ni4A?
GOST 4543 40X 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
GOST 4543 40X
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5100–6000 mm (200.79–236.22 in)
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
GOST 4543 40X
2 active listings and RFQs →
GB/T 3077 12Cr2Ni4A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 4543 40X and GB/T 3077 12Cr2Ni4A?
GOST 4543 40X specifies Cu which is not specified for GB/T 3077 12Cr2Ni4A.
Can GOST 4543 40X be substituted with GB/T 3077 12Cr2Ni4A?
GOST 4543 40X 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.