Close Alternative — 81.3% match
based on chemical composition and mechanical property overlap.
JIS G4053 SMnC420 (JIS G4053:2008) and EN 10084 28Cr4 (EN 10084:2008) are both steel grades.
Both fall under the Alloy Steel category.
JIS G4053 SMnC420 is typically used for case hardened gears, shafts, cams, pins, automotive components, while EN 10084 28Cr4 is commonly used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1).
JIS G4053 SMnC420 is defined under Japanese Industrial Standards (JIS), originating from Japan, while EN 10084 28Cr4 is defined under European Standard (EN), originating from Europe.
As per chemical composition, JIS G4053 SMnC420 vs EN 10084 28Cr4 is a 72% match.
As per mechanical properties, the match is 100%.
Combined, this makes them a close alternative overall at 81.3%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
JIS G4053 SMnC420
EN 10084 28Cr4
Tensile Strength
785–980 MPa
Not specified
Case Hardness HRC
58–62
Not specified
Core Hardness HB
217–277
Not specified
Elongation
≥10%
Not specified
Condition
Not specified
Soft annealed
Hardenability
Not specified
+H band at 1.5 mm from the quenched end: 45 to 53 HRC
Hardness
Not specified
Soft annealed: 217 HB max
Typical Applications
JIS G4053 SMnC420
Case hardened gears, shafts, cams, pins, automotive components
EN 10084 28Cr4
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
Can JIS G4053 SMnC420 Be Substituted With EN 10084 28Cr4?
JIS G4053 SMnC420 and EN 10084 28Cr4 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 JIS G4053 SMnC420 and EN 10084 28Cr4?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can JIS G4053 SMnC420 be substituted with EN 10084 28Cr4?
JIS G4053 SMnC420 and EN 10084 28Cr4 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.