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UNI 7846 18CrMo4 vs NF A35-565 100C6

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

UNI 7846 18CrMo4 (UNI 7846:1978) and NF A35-565 100C6 are both steel grades. Both fall under the Alloy Steel category. UNI 7846 18CrMo4 is typically used for used in gears, shafts, pinions, crankshafts, axles, and heavy machinery components., while NF A35-565 100C6 is commonly used for ball bearings, roller bearings, bearing races, rollers, precision tools, wear resistant parts. UNI 7846 18CrMo4 is defined under Ente Nazionale Italiano di Unificazione (UNI), originating from Italy, while NF A35-565 100C6 is defined under Association Francaise de Normalisation (NF), originating from France.

As per chemical composition, UNI 7846 18CrMo4 vs NF A35-565 100C6 is a 66% match. As per mechanical properties, the match is 6.3%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With UNI 7846 18CrMo4:
GB/T 3077 12Cr2Ni4A UNI 11234 100Cr6 GOST 4543 12HN3A IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
66%
MECHANICAL MATCH
6.3%
OVERALL
35%
Specifications
Property UNI 7846 18CrMo4 NF A35-565 100C6
Standard UNI 7846:1978 NF A35-565
Category Alloy Steel Alloy Steel
C (%) 0.15-0.21 0.95-1.05
Si (%) 0.15-0.40 0.15-0.35
Mn (%) 0.60-0.90 0.25-0.45
Cr (%) 0.90-1.20 1.35-1.65
Mo (%) 0.15-0.30 Not specified
P (%) 0.035 max <=0.027
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 UNI 7846 18CrMo4 NF A35-565 100C6
Tensile Strength 700-900 MPa 850-1100 MPa
Yield Strength 540 MPa min Not specified
Elongation 14% min Not specified
Hardness 200-260 HB 60-66 HRC
Typical Applications
UNI 7846 18CrMo4
Used in gears, shafts, pinions, crankshafts, axles, and heavy machinery components.
NF A35-565 100C6
ball bearings, roller bearings, bearing races, rollers, precision tools, wear resistant parts
Key Differences
Can UNI 7846 18CrMo4 Be Substituted With NF A35-565 100C6?
UNI 7846 18CrMo4 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.
Forms & Sizes Available on M-EX
UNI 7846 18CrMo4
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5200–5400 mm (204.72–212.6 in)
NF A35-565 100C6
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6700–6700 mm (263.78–263.78 in)
On M-EX Right Now
UNI 7846 18CrMo4
2 active listings and RFQs →
NF A35-565 100C6
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between UNI 7846 18CrMo4 and NF A35-565 100C6?
UNI 7846 18CrMo4 specifies Mo which is not specified for NF A35-565 100C6.
Can UNI 7846 18CrMo4 be substituted with NF A35-565 100C6?
UNI 7846 18CrMo4 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.