Close Alternative — 78% match
based on chemical composition and mechanical property overlap.
GB/T 3077 45CrNi (GB/T 3077:2015) and GOST 4543 40XH (GOST 4543-2016) are both steel grades.
Both fall under the Alloy Steel category.
GB/T 3077 45CrNi is typically used for hot-rolled or forged structural alloy steel bars, while GOST 4543 40XH is commonly used for heavy-duty gears, transmission shafts, axles, high-strength fasteners, forged machinery parts.
GB/T 3077 45CrNi is defined under Guobiao Standards (GB/T) (China).
As per chemical composition, GB/T 3077 45CrNi vs GOST 4543 40XH is a 91.9% match.
As per mechanical properties, the match is 50%.
Combined, this makes them a close alternative overall at 78%.
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 45CrNi
GOST 4543 40XH
Tensile Strength
>=980 MPa
980-1180 MPa
Yield Strength
>=785 MPa
>=785 MPa
Elongation
>=10%
>=10%
Hardness
<=255 HB
241-285 HB
Condition
Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered
Not specified
Typical Applications
GB/T 3077 45CrNi
Hot-rolled or forged structural alloy steel bars
GOST 4543 40XH
heavy-duty gears, transmission shafts, axles, high-strength fasteners, forged machinery parts
Can GB/T 3077 45CrNi Be Substituted With GOST 4543 40XH?
GB/T 3077 45CrNi and GOST 4543 40XH 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 GB/T 3077 45CrNi and GOST 4543 40XH?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 3077 45CrNi be substituted with GOST 4543 40XH?
GB/T 3077 45CrNi and GOST 4543 40XH 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.