Close Alternative — 83.8% match
based on chemical composition and mechanical property overlap.
EN 10084 20MoCr4 (EN 10084:2008) and EN 10084 18CrMo4 (EN 10084:2008) 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 EN 10084 18CrMo4 is commonly used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1).
EN 10084 20MoCr4 is defined under European Standard (EN), originating from Europe, while EN 10084 18CrMo4 is defined under European Standard (EN), originating from Europe.
As per chemical composition, EN 10084 20MoCr4 vs EN 10084 18CrMo4 is a 75.7% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a close alternative overall at 83.8%.
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
EN 10084 18CrMo4
Condition
Soft annealed
Soft annealed
Hardenability
+H band at 1.5 mm from the quenched end: 41 to 49 HRC
+H band at 1.5 mm from the quenched end: 39 to 47 HRC
Hardness
Soft annealed: 207 HB max
Soft annealed: 207 HB max
Typical Applications
EN 10084 20MoCr4
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
EN 10084 18CrMo4
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
Can EN 10084 20MoCr4 Be Substituted With EN 10084 18CrMo4?
EN 10084 20MoCr4 and EN 10084 18CrMo4 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 EN 10084 18CrMo4?
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 EN 10084 18CrMo4?
EN 10084 20MoCr4 and EN 10084 18CrMo4 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.