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GOST 4543 20HNM vs GB/T 3077 12Cr2Ni4A

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

GOST 4543 20HNM (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 20HNM is typically used for used for gears, splined shafts, bushings, axles, and machine drive 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 20HNM vs GB/T 3077 12Cr2Ni4A is a 52.6% match. As per mechanical properties, the match is 9.8%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GOST 4543 20HNM:
GOST 4543 12HN3A NF A35-565 100C6 UNI 11234 100Cr6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 105Cr5 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
52.6%
MECHANICAL MATCH
9.8%
OVERALL
35%
Specifications
Property GOST 4543 20HNM GB/T 3077 12Cr2Ni4A
Standard GOST 4543-2016 GB/T 3077-2015
Category Alloy Steel Alloy Steel
C (%) 0.17-0.24 0.10-0.15
Cr (%) 0.4-0.7 1.25-1.65
Ni (%) 0.4-0.7 3.25-3.75
Mo (%) 0.15-0.25 Not specified
Mn (%) 0.5-0.8 0.30-0.60
Si (%) Not specified 0.17-0.37
P (%) Not specified 0.025 max
S (%) Not specified 0.025 max
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 20HNM GB/T 3077 12Cr2Ni4A
Tensile Strength 850-1000 MPa 980-1180 MPa
Yield Strength 685 MPa min 785-980 MPa
Elongation 12% min 10-14%
Hardness 56-60 HRC (case) 58-62 HRC (case)
Typical Applications
GOST 4543 20HNM
Used for gears, splined shafts, bushings, axles, and machine drive components.
GB/T 3077 12Cr2Ni4A
Used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.
Key Differences
Can GOST 4543 20HNM Be Substituted With GB/T 3077 12Cr2Ni4A?
GOST 4543 20HNM 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 20HNM
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5100–7000 mm (200.79–275.59 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 20HNM
2 active listings and RFQs →
GB/T 3077 12Cr2Ni4A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between GOST 4543 20HNM and GB/T 3077 12Cr2Ni4A?
GOST 4543 20HNM specifies Mo which is not specified for GB/T 3077 12Cr2Ni4A. GB/T 3077 12Cr2Ni4A specifies Si, P, S which are not specified for GOST 4543 20HNM.
Can GOST 4543 20HNM be substituted with GB/T 3077 12Cr2Ni4A?
GOST 4543 20HNM 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.