Close Alternative — 79.5% match
based on chemical composition and mechanical property overlap.
EN 10084 20MoCrS3 (EN 10084:2008) and GB/T 3077 20CrMnMo (GB/T 3077:2015) are both steel grades.
Both fall under the Alloy Steel category.
EN 10084 20MoCrS3 is typically used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1), while GB/T 3077 20CrMnMo is commonly used for hot-rolled or forged structural alloy steel bars.
EN 10084 20MoCrS3 is defined under European Standard (EN), originating from Europe, while GB/T 3077 20CrMnMo is defined under Guobiao Standards (GB/T), originating from China.
As per chemical composition, EN 10084 20MoCrS3 vs GB/T 3077 20CrMnMo is a 69.3% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a close alternative overall at 79.5%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
EN 10084 20MoCrS3
GB/T 3077 20CrMnMo
Condition
Soft annealed
Quenched and tempered, test sample 15 mm; hardness is for bars delivered annealed or high temperature tempered
Hardenability
+H band at 1.5 mm from the quenched end: 41 to 49 HRC
Not specified
Hardness
Soft annealed: 217 HB max
<=217 HB
Tensile Strength
Not specified
>=1180 MPa
Yield Strength
Not specified
>=885 MPa
Elongation
Not specified
>=10%
Typical Applications
EN 10084 20MoCrS3
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
GB/T 3077 20CrMnMo
Hot-rolled or forged structural alloy steel bars
Key Differences
GB/T 3077 20CrMnMo specifies Cu which is not specified for EN 10084 20MoCrS3.
Can EN 10084 20MoCrS3 Be Substituted With GB/T 3077 20CrMnMo?
EN 10084 20MoCrS3 and GB/T 3077 20CrMnMo 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 EN 10084 20MoCrS3 and GB/T 3077 20CrMnMo?
GB/T 3077 20CrMnMo specifies Cu which is not specified for EN 10084 20MoCrS3.
Can EN 10084 20MoCrS3 be substituted with GB/T 3077 20CrMnMo?
EN 10084 20MoCrS3 and GB/T 3077 20CrMnMo 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.