Close Alternative — 70.6% match
based on chemical composition and mechanical property overlap.
GB/T 3077 40CrNi (GB/T 3077:2015) and GOST 4543 40X (GOST 4543-2016) are both steel grades.
Both fall under the Alloy Steel category.
GB/T 3077 40CrNi is typically used for hot-rolled or forged structural alloy steel bars, while GOST 4543 40X is commonly used for gears, shafts, axles, spindles, studs, automotive components.
GB/T 3077 40CrNi is defined under Guobiao Standards (GB/T) (China).
As per chemical composition, GB/T 3077 40CrNi vs GOST 4543 40X is a 81% match.
As per mechanical properties, the match is 50%.
Combined, this makes them a close alternative overall at 70.6%.
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 40CrNi
GOST 4543 40X
Tensile Strength
>=980 MPa
980-1180 MPa
Yield Strength
>=785 MPa
>=785 MPa
Elongation
>=10%
>=10%
Hardness
<=241 HB
229-285 HB
Condition
Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered
Can GB/T 3077 40CrNi Be Substituted With GOST 4543 40X?
GB/T 3077 40CrNi and GOST 4543 40X 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 40CrNi and GOST 4543 40X?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 3077 40CrNi be substituted with GOST 4543 40X?
GB/T 3077 40CrNi and GOST 4543 40X 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.