Minimal Match — 35% match
based on chemical composition and mechanical property overlap.
NF A35-552 35CD4 (NF A35-552:1986) and GOST 4543 12HN3A (GOST 4543-2016) are both steel grades.
Both fall under the Alloy Steel category.
NF A35-552 35CD4 is typically used for gears, shafts, axles, connecting rods, high strength bolts, automotive parts, while GOST 4543 12HN3A is commonly used for used for gears, pinions, crankshafts, aircraft parts, and transmission components..
NF A35-552 35CD4 is defined under Association Francaise de Normalisation (NF) (France).
As per chemical composition, NF A35-552 35CD4 vs GOST 4543 12HN3A is a 58.3% match.
As per mechanical properties, the match is 18.8%.
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
NF A35-552 35CD4
GOST 4543 12HN3A
Tensile Strength
850-1000 MPa
850-1050 MPa
Yield Strength
>=650 MPa
685 MPa min
Elongation
>=14%
11% min
Hardness
248-302 HB
58-62 HRC (case)
Typical Applications
NF A35-552 35CD4
gears, shafts, axles, connecting rods, high strength bolts, automotive parts
GOST 4543 12HN3A
Used for gears, pinions, crankshafts, aircraft parts, and transmission components.
Key Differences
NF A35-552 35CD4 specifies S, P, Mo which are not specified for GOST 4543 12HN3A.
GOST 4543 12HN3A specifies Ni which is not specified for NF A35-552 35CD4.
Can NF A35-552 35CD4 Be Substituted With GOST 4543 12HN3A?
NF A35-552 35CD4 and GOST 4543 12HN3A 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 NF A35-552 35CD4 and GOST 4543 12HN3A?
NF A35-552 35CD4 specifies S, P, Mo which are not specified for GOST 4543 12HN3A. GOST 4543 12HN3A specifies Ni which is not specified for NF A35-552 35CD4.
Can NF A35-552 35CD4 be substituted with GOST 4543 12HN3A?
NF A35-552 35CD4 and GOST 4543 12HN3A 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.