Close Alternative — 78.8% match
based on chemical composition and mechanical property overlap.
GOST 4543 12HN3A (GOST 4543-2016) and GB/T 3077 12CrNi3 (GB/T 3077:2015) are both steel grades.
Both fall under the Alloy Steel category.
GOST 4543 12HN3A is typically used for used for gears, pinions, crankshafts, aircraft parts, and transmission components., while GB/T 3077 12CrNi3 is commonly used for hot-rolled or forged structural alloy steel bars.
GB/T 3077 12CrNi3 is defined under Guobiao Standards (GB/T) (China).
As per chemical composition, GOST 4543 12HN3A vs GB/T 3077 12CrNi3 is a 93.2% match.
As per mechanical properties, the match is 50%.
Combined, this makes them a close alternative overall at 78.8%.
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 12HN3A
GB/T 3077 12CrNi3
Tensile Strength
850-1050 MPa
>=930 MPa
Yield Strength
685 MPa min
>=685 MPa
Elongation
11% min
>=11%
Hardness
58-62 HRC (case)
<=217 HB
Condition
Not specified
Quenched and tempered, test sample 15 mm; hardness is for bars delivered annealed or high temperature tempered
Typical Applications
GOST 4543 12HN3A
Used for gears, pinions, crankshafts, aircraft parts, and transmission components.
GB/T 3077 12CrNi3
Hot-rolled or forged structural alloy steel bars
Key Differences
GB/T 3077 12CrNi3 specifies P, S, Cu which are not specified for GOST 4543 12HN3A.
Can GOST 4543 12HN3A Be Substituted With GB/T 3077 12CrNi3?
GOST 4543 12HN3A and GB/T 3077 12CrNi3 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.
What is the difference between GOST 4543 12HN3A and GB/T 3077 12CrNi3?
GB/T 3077 12CrNi3 specifies P, S, Cu which are not specified for GOST 4543 12HN3A.
Can GOST 4543 12HN3A be substituted with GB/T 3077 12CrNi3?
GOST 4543 12HN3A and GB/T 3077 12CrNi3 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.