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Nickel-copper alloys

Dr. Dmitri Kopeliovich

Nickel-Copper Alloys (trade mark Monel) are nickel base alloys containing 29-33% of copper (Cu) as the major alloying element. Copper and nickel form mono-phase solid solution.

Nickel-Copper Alloys, containing 3% of aluminum (Al) and 0.6% of titanium (Ti) as additional alloying elements (Monel K-500), are heat-treatable and may be strengthened by precipitation hardening.

Nickel-Copper Alloys have high corrosion resistance in acids and alkalis, high mechanical strength combined with good ductility and low coefficient of thermal expansion. Machinability of the alloys is poor.

Nickel-Copper Alloys (Monel) are used for manufacturing chemical processing equipment, valve stems, springs, pumps, shafts, fittings, heat exchangers, screw machine products, marine equipment.

Chemical compositions of some nickel-copper alloys

Designation Cu,% Al,% Ti,% Fe,% Mn,% Si,% Ni,%
Monel 400 28-34 - - 2.5 max. 2.0 max - 63 min.
Monel 405 28-34 - - 2.5 max. 2.0 max 0.5 max. 63 min.
Monel K-500 27-33 2.3-3.15 0.35-0.85 2.0 max. 1.5 max. - 63 min.

Properties of some nickel-copper alloys

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nickel-copper_alloys.txt · Last modified: 2023/12/13 by dmitri_kopeliovich
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