Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
AISI 4340 and NF A35-565 100C6 are both steel grades.
Both fall under the Alloy Steel category.
AISI 4340 is typically used for aircraft parts, heavy duty gears, crankshafts, high tensile bolts, while NF A35-565 100C6 is commonly used for ball bearings, roller bearings, bearing races, rollers, precision tools, wear resistant parts.
AISI 4340 is defined under AISI, originating from United States, while NF A35-565 100C6 is defined under Association Francaise de Normalisation (NF), originating from France.
As per chemical composition, AISI 4340 vs NF A35-565 100C6 is a 57.3% match.
As per mechanical properties, the match is 0%.
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
AISI 4340
NF A35-565 100C6
Condition
Quenched & Tempered
Not specified
Tensile Strength
1000–1200 MPa
850-1100 MPa
Yield Strength
≥830 MPa
Not specified
Elongation
≥12%
Not specified
Hardness
285–341 HB
60-66 HRC
Typical Applications
AISI 4340
Aircraft parts, heavy duty gears, crankshafts, high tensile bolts
AISI 4340 specifies Mo, Ni which are not specified for NF A35-565 100C6.
NF A35-565 100C6 specifies S, P which are not specified for AISI 4340.
Can AISI 4340 Be Substituted With NF A35-565 100C6?
AISI 4340 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 AISI 4340 and NF A35-565 100C6?
AISI 4340 specifies Mo, Ni which are not specified for NF A35-565 100C6. NF A35-565 100C6 specifies S, P which are not specified for AISI 4340.
Can AISI 4340 be substituted with NF A35-565 100C6?
AISI 4340 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.