Strong Match — 86.2% match
based on chemical composition and mechanical property overlap.
SAE J404 5120 (SAE J404:2009) and EN 10084 17Cr3 (EN 10084:2008) are both steel grades.
Both fall under the Alloy Steel category.
SAE J404 5120 is typically used for case hardened gears, pins, shafts, cams, automotive transmission parts, while EN 10084 17Cr3 is commonly used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1).
SAE J404 5120 is defined under SAE International, originating from United States, while EN 10084 17Cr3 is defined under European Standard (EN), originating from Europe.
As per chemical composition, SAE J404 5120 vs EN 10084 17Cr3 is a 86.2% match.
Mechanical property data is not available for both grades, so this factor could not be scored.
Combined, this makes them a strong match overall at 86.2%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
SAE J404 5120
EN 10084 17Cr3
Condition
Not specified
Soft annealed
Hardenability
Not specified
+H band at 1.5 mm from the quenched end: 39 to 47 HRC
Hardness
Not specified
Soft annealed: 174 HB max
Typical Applications
SAE J404 5120
Case hardened gears, pins, shafts, cams, automotive transmission parts
EN 10084 17Cr3
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
Can SAE J404 5120 Be Substituted With EN 10084 17Cr3?
SAE J404 5120 and EN 10084 17Cr3 overlap closely enough on chemistry and mechanical properties that EN 10084 17Cr3 is often considered as a substitute for SAE J404 5120 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between SAE J404 5120 and EN 10084 17Cr3?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can SAE J404 5120 be substituted with EN 10084 17Cr3?
SAE J404 5120 and EN 10084 17Cr3 overlap closely enough on chemistry and mechanical properties that EN 10084 17Cr3 is often considered as a substitute for SAE J404 5120 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.