Minimal Match — 53.4% match
based on chemical composition and mechanical property overlap.
GOST 4543 40HFA (GOST 4543-2016) and NF A35-565 100C6 are both steel grades.
Both fall under the Alloy Steel category.
GOST 4543 40HFA is typically used for used for springs, shafts, gears, fasteners, and aircraft structural 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 40HFA vs NF A35-565 100C6 is a 67.6% match.
As per mechanical properties, the match is 25%.
Combined, this makes them a minimal match overall at 53.4%.
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 40HFA
NF A35-565 100C6
Tensile Strength
950-1150 MPa
850-1100 MPa
Yield Strength
785 MPa min
Not specified
Elongation
11% min
Not specified
Hardness
269-331 HB
60-66 HRC
Typical Applications
GOST 4543 40HFA
Used for springs, shafts, gears, fasteners, and aircraft structural components.
GOST 4543 40HFA specifies V which is not specified for NF A35-565 100C6.
NF A35-565 100C6 specifies S, P which are not specified for GOST 4543 40HFA.
Can GOST 4543 40HFA Be Substituted With NF A35-565 100C6?
GOST 4543 40HFA 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 40HFA and NF A35-565 100C6?
GOST 4543 40HFA specifies V which is not specified for NF A35-565 100C6. NF A35-565 100C6 specifies S, P which are not specified for GOST 4543 40HFA.
Can GOST 4543 40HFA be substituted with NF A35-565 100C6?
GOST 4543 40HFA 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.