Related Material — 66.5% match
based on chemical composition and mechanical property overlap.
GOST 4543 40X (GOST 4543-2016) and GB/T 3077 45CrNi (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 45CrNi is commonly used for hot-rolled or forged structural alloy steel bars.
GB/T 3077 45CrNi is defined under Guobiao Standards (GB/T) (China).
As per chemical composition, GOST 4543 40X vs GB/T 3077 45CrNi is a 74.8% match.
As per mechanical properties, the match is 50%.
Combined, this makes them a related material overall at 66.5%.
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 45CrNi
Tensile Strength
980-1180 MPa
>=980 MPa
Yield Strength
>=785 MPa
>=785 MPa
Elongation
>=10%
>=10%
Hardness
229-285 HB
<=255 HB
Condition
Not specified
Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered
Can GOST 4543 40X Be Substituted With GB/T 3077 45CrNi?
GOST 4543 40X and GB/T 3077 45CrNi 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.
What is the difference between GOST 4543 40X and GB/T 3077 45CrNi?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GOST 4543 40X be substituted with GB/T 3077 45CrNi?
GOST 4543 40X and GB/T 3077 45CrNi 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.