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NF A35-552 34NCD6 vs GOST 4543 12HN3A

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

NF A35-552 34NCD6 (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 34NCD6 is typically used for used for aircraft parts, transmission shafts, gears, crankshafts, connecting rods, and heavy-duty fasteners., while GOST 4543 12HN3A is commonly used for used for gears, pinions, crankshafts, aircraft parts, and transmission components.. NF A35-552 34NCD6 is defined under Association Francaise de Normalisation (NF) (France).

As per chemical composition, NF A35-552 34NCD6 vs GOST 4543 12HN3A is a 58.3% match. As per mechanical properties, the match is 15%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With NF A35-552 34NCD6:
UNI 11234 100Cr6 NF A35-565 100C6 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 07Cr4Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
58.3%
MECHANICAL MATCH
15%
OVERALL
35%
Specifications
Property NF A35-552 34NCD6 GOST 4543 12HN3A
Standard NF A35-552:1986 GOST 4543-2016
Category Alloy Steel Alloy Steel
C (%) 0.30-0.38 0.09-0.16
Si (%) 0.15-0.40 0.17-0.37
Mn (%) 0.50-0.80 0.3-0.6
Ni (%) 1.30-1.70 2.75-3.15
Cr (%) 1.30-1.70 0.6-0.9
Mo (%) 0.15-0.30 Not specified
P (%) 0.035 max Not specified
S (%) 0.035 max Not specified
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 34NCD6 GOST 4543 12HN3A
Tensile Strength 900-1100 MPa 850-1050 MPa
Yield Strength 700-850 MPa 685 MPa min
Elongation 10-14% 11% min
Hardness 270-340 HB 58-62 HRC (case)
Typical Applications
NF A35-552 34NCD6
Used for aircraft parts, transmission shafts, gears, crankshafts, connecting rods, and heavy-duty fasteners.
GOST 4543 12HN3A
Used for gears, pinions, crankshafts, aircraft parts, and transmission components.
Key Differences
Can NF A35-552 34NCD6 Be Substituted With GOST 4543 12HN3A?
NF A35-552 34NCD6 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.
Forms & Sizes Available on M-EX
NF A35-552 34NCD6
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–7000 mm (196.85–275.59 in)
GOST 4543 12HN3A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5600–6600 mm (220.47–259.84 in)
On M-EX Right Now
NF A35-552 34NCD6
2 active listings and RFQs →
GOST 4543 12HN3A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between NF A35-552 34NCD6 and GOST 4543 12HN3A?
NF A35-552 34NCD6 specifies Mo, P, S which are not specified for GOST 4543 12HN3A.
Can NF A35-552 34NCD6 be substituted with GOST 4543 12HN3A?
NF A35-552 34NCD6 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.