Close Alternative — 80.7% match
based on chemical composition and mechanical property overlap.
GB/T 3077 20CrMnMo (GB/T 3077:2015) and EN 10084 20MoCr3 (EN 10084:2008) are both steel grades.
Both fall under the Alloy Steel category.
GB/T 3077 20CrMnMo is typically used for hot-rolled or forged structural alloy steel bars, while EN 10084 20MoCr3 is commonly used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1).
GB/T 3077 20CrMnMo is defined under Guobiao Standards (GB/T), originating from China, while EN 10084 20MoCr3 is defined under European Standard (EN), originating from Europe.
As per chemical composition, GB/T 3077 20CrMnMo vs EN 10084 20MoCr3 is a 71% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a close alternative overall at 80.7%.
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 20CrMnMo
EN 10084 20MoCr3
Tensile Strength
>=1180 MPa
Not specified
Yield Strength
>=885 MPa
Not specified
Elongation
>=10%
Not specified
Hardness
<=217 HB
Soft annealed: 217 HB max
Condition
Quenched and tempered, test sample 15 mm; hardness is for bars delivered annealed or high temperature tempered
Soft annealed
Hardenability
Not specified
+H band at 1.5 mm from the quenched end: 41 to 49 HRC
Typical Applications
GB/T 3077 20CrMnMo
Hot-rolled or forged structural alloy steel bars
EN 10084 20MoCr3
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
Key Differences
GB/T 3077 20CrMnMo specifies Cu which is not specified for EN 10084 20MoCr3.
Can GB/T 3077 20CrMnMo Be Substituted With EN 10084 20MoCr3?
GB/T 3077 20CrMnMo and EN 10084 20MoCr3 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 20CrMnMo and EN 10084 20MoCr3?
GB/T 3077 20CrMnMo specifies Cu which is not specified for EN 10084 20MoCr3.
Can GB/T 3077 20CrMnMo be substituted with EN 10084 20MoCr3?
GB/T 3077 20CrMnMo and EN 10084 20MoCr3 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.