Close Alternative — 72.4% match
based on chemical composition and mechanical property overlap.
NF A35-565 18NCD4 and SAE J404 8617 (SAE J404:2009) are both steel grades.
Both fall under the Alloy Steel category.
NF A35-565 18NCD4 is typically used for used for gears, aerospace shafts, pinions, transmission components, heavy-duty bearings, and carburized mechanical parts., while SAE J404 8617 is commonly used for case hardened gears, cams, light duty shafts.
NF A35-565 18NCD4 is defined under Association Francaise de Normalisation (NF), originating from France, while SAE J404 8617 is defined under SAE International, originating from United States.
As per chemical composition, NF A35-565 18NCD4 vs SAE J404 8617 is a 72.4% 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 72.4%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
NF A35-565 18NCD4
SAE J404 8617
Tensile Strength
850-1100 MPa
Not specified
Yield Strength
650-850 MPa
Not specified
Elongation
10-16%
Not specified
Hardness
58-62 HRC (case)
Not specified
Typical Applications
NF A35-565 18NCD4
Used for gears, aerospace shafts, pinions, transmission components, heavy-duty bearings, and carburized mechanical parts.
SAE J404 8617
Case hardened gears, cams, light duty shafts
Can NF A35-565 18NCD4 Be Substituted With SAE J404 8617?
NF A35-565 18NCD4 and SAE J404 8617 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 NF A35-565 18NCD4 and SAE J404 8617?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can NF A35-565 18NCD4 be substituted with SAE J404 8617?
NF A35-565 18NCD4 and SAE J404 8617 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.