Close Alternative — 77.9% match
based on chemical composition and mechanical property overlap.
EN 10084 20MoCr4 (EN 10084:2008) and KS D3867 SCM415 (KS D 3867:2025) are both steel grades.
Both fall under the Alloy Steel category.
EN 10084 20MoCr4 is typically used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1), while KS D3867 SCM415 is commonly used for gears, shafts, camshafts, piston pins, precision machine components requiring hard surface and tough core..
EN 10084 20MoCr4 is defined under European Standard (EN), originating from Europe, while KS D3867 SCM415 is defined under Korean Industrial Standards (KS), originating from South Korea.
As per chemical composition, EN 10084 20MoCr4 vs KS D3867 SCM415 is a 77.9% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a close alternative overall at 77.9%.
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 20MoCr4
KS D3867 SCM415
Condition
Soft annealed
Not specified
Hardenability
+H band at 1.5 mm from the quenched end: 41 to 49 HRC
Not specified
Hardness
Soft annealed: 207 HB max
Not specified
Typical Applications
EN 10084 20MoCr4
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
KS D3867 SCM415
Gears, shafts, camshafts, piston pins, precision machine components requiring hard surface and tough core.
Can EN 10084 20MoCr4 Be Substituted With KS D3867 SCM415?
EN 10084 20MoCr4 and KS D3867 SCM415 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 20MoCr4 and KS D3867 SCM415?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can EN 10084 20MoCr4 be substituted with KS D3867 SCM415?
EN 10084 20MoCr4 and KS D3867 SCM415 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.