Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
GOST 4543 20HNM (GOST 4543-2016) and NF A35-565 100C6 are both steel grades.
Both fall under the Alloy Steel category.
GOST 4543 20HNM is typically used for used for gears, splined shafts, bushings, axles, and machine drive components., while NF A35-565 100C6 is commonly used for ball bearings, roller bearings, bearing races, rollers, precision tools, wear resistant parts.
NF A35-565 100C6 is defined under Association Francaise de Normalisation (NF) (France).
As per chemical composition, GOST 4543 20HNM vs NF A35-565 100C6 is a 51.5% match.
As per mechanical properties, the match is 30%.
Combined, this makes them a minimal match overall at 35%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
GOST 4543 20HNM
NF A35-565 100C6
Tensile Strength
850-1000 MPa
850-1100 MPa
Yield Strength
685 MPa min
Not specified
Elongation
12% min
Not specified
Hardness
56-60 HRC (case)
60-66 HRC
Typical Applications
GOST 4543 20HNM
Used for gears, splined shafts, bushings, axles, and machine drive components.
GOST 4543 20HNM specifies Ni, Mo which are not specified for NF A35-565 100C6.
NF A35-565 100C6 specifies Si, S, P which are not specified for GOST 4543 20HNM.
Can GOST 4543 20HNM Be Substituted With NF A35-565 100C6?
GOST 4543 20HNM and NF A35-565 100C6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
What is the difference between GOST 4543 20HNM and NF A35-565 100C6?
GOST 4543 20HNM specifies Ni, Mo which are not specified for NF A35-565 100C6. NF A35-565 100C6 specifies Si, S, P which are not specified for GOST 4543 20HNM.
Can GOST 4543 20HNM be substituted with NF A35-565 100C6?
GOST 4543 20HNM and NF A35-565 100C6 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.