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NF A35-552 34NCD6 vs GB/T 3077 12Cr2Ni4A

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

NF A35-552 34NCD6 (NF A35-552:1986) and GB/T 3077 12Cr2Ni4A (GB/T 3077-2015) 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 GB/T 3077 12Cr2Ni4A is commonly used for used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.. NF A35-552 34NCD6 is defined under Association Francaise de Normalisation (NF), originating from France, while GB/T 3077 12Cr2Ni4A is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, NF A35-552 34NCD6 vs GB/T 3077 12Cr2Ni4A is a 65% match. As per mechanical properties, the match is 41.5%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With NF A35-552 34NCD6:
UNI 11234 100Cr6 NF A35-565 100C6 GOST 4543 12HN3A IS 1570 (Part 4) 07Cr4Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
65%
MECHANICAL MATCH
41.5%
OVERALL
35%
Specifications
Property NF A35-552 34NCD6 GB/T 3077 12Cr2Ni4A
Standard NF A35-552:1986 GB/T 3077-2015
Category Alloy Steel Alloy Steel
C (%) 0.30-0.38 0.10-0.15
Si (%) 0.15-0.40 0.17-0.37
Mn (%) 0.50-0.80 0.30-0.60
Ni (%) 1.30-1.70 3.25-3.75
Cr (%) 1.30-1.70 1.25-1.65
Mo (%) 0.15-0.30 Not specified
P (%) 0.035 max 0.025 max
S (%) 0.035 max 0.025 max
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 GB/T 3077 12Cr2Ni4A
Tensile Strength 900-1100 MPa 980-1180 MPa
Yield Strength 700-850 MPa 785-980 MPa
Elongation 10-14% 10-14%
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.
GB/T 3077 12Cr2Ni4A
Used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.
Key Differences
Can NF A35-552 34NCD6 Be Substituted With GB/T 3077 12Cr2Ni4A?
NF A35-552 34NCD6 and GB/T 3077 12Cr2Ni4A 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)
GB/T 3077 12Cr2Ni4A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–6600 mm (196.85–259.84 in)
On M-EX Right Now
NF A35-552 34NCD6
2 active listings and RFQs →
GB/T 3077 12Cr2Ni4A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between NF A35-552 34NCD6 and GB/T 3077 12Cr2Ni4A?
NF A35-552 34NCD6 specifies Mo which is not specified for GB/T 3077 12Cr2Ni4A.
Can NF A35-552 34NCD6 be substituted with GB/T 3077 12Cr2Ni4A?
NF A35-552 34NCD6 and GB/T 3077 12Cr2Ni4A 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.