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NF A35-552 40NCD3 vs UNI 11234 100Cr6

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

NF A35-552 40NCD3 (NF A35-552:1986) and UNI 11234 100Cr6 (UNI 11234:2007) are both steel grades. Both fall under the Alloy Steel category. NF A35-552 40NCD3 is typically used for used for gears, aircraft fittings, transmission shafts, crankshafts, heavy-duty bolts, and connecting rods., while UNI 11234 100Cr6 is commonly used for ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components. NF A35-552 40NCD3 is defined under Association Francaise de Normalisation (NF), originating from France, while UNI 11234 100Cr6 is defined under Ente Nazionale Italiano di Unificazione (UNI), originating from Italy.

As per chemical composition, NF A35-552 40NCD3 vs UNI 11234 100Cr6 is a 57.2% match. As per mechanical properties, the match is 32.5%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With NF A35-552 40NCD3:
GOST 4543 12HN3A NF A35-565 100C6 GB/T 3077 12Cr2Ni4A IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
57.2%
MECHANICAL MATCH
32.5%
OVERALL
35%
Specifications
Property NF A35-552 40NCD3 UNI 11234 100Cr6
Standard NF A35-552:1986 UNI 11234:2007
Category Alloy Steel Alloy Steel
C (%) 0.37-0.43 0.93-1.05
Si (%) 0.15-0.40 0.15-0.35
Mn (%) 0.50-0.80 0.25-0.45
Ni (%) 1.00-1.40 Not specified
Cr (%) 0.60-1.00 1.35-1.65
Mo (%) 0.15-0.30 Not specified
P (%) 0.035 max <=0.025
S (%) 0.035 max <=0.025
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 40NCD3 UNI 11234 100Cr6
Tensile Strength 850-1050 MPa 750-1000 MPa
Yield Strength 650-850 MPa 400-600 MPa
Elongation 10-15% 10-14 %
Hardness 250-320 HB 60-64 HRC
Typical Applications
NF A35-552 40NCD3
Used for gears, aircraft fittings, transmission shafts, crankshafts, heavy-duty bolts, and connecting rods.
UNI 11234 100Cr6
ball bearings,roller bearings,needle bearings,dies,punches,gauges,wear resistant components
Key Differences
Can NF A35-552 40NCD3 Be Substituted With UNI 11234 100Cr6?
NF A35-552 40NCD3 and UNI 11234 100Cr6 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 40NCD3
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6500–6600 mm (255.91–259.84 in)
UNI 11234 100Cr6
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5700–6800 mm (224.41–267.72 in)
On M-EX Right Now
NF A35-552 40NCD3
2 active listings and RFQs →
UNI 11234 100Cr6
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between NF A35-552 40NCD3 and UNI 11234 100Cr6?
NF A35-552 40NCD3 specifies Ni, Mo which are not specified for UNI 11234 100Cr6.
Can NF A35-552 40NCD3 be substituted with UNI 11234 100Cr6?
NF A35-552 40NCD3 and UNI 11234 100Cr6 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.