Copper Nickel covers a wide variety of alloys that are single phase throughout the full range of compositions. There are many standard alloys within this range and most of them will have small amounts of other elements added to give the specific properties required. Accurate control of resistivity during casting, typically +/- 5 %, explains why CuNiR alloys are widely used for resistance applications.CuNi44 exhibits unique resistivity stability to temperature change. It is also possible to cast a very low temperature coefficient of resistance grade.

Two alloys within this group which are often chosen for marine applications are, CN107 (C71500 containing 30% Nickel & CN102 (C70600) containing 10% Nickel. They both have the addition of Iron which improves the sea water corrosion resistance.

Special electronic CuNi25 and CuNi30 grades, with low impurity levels & very good inclusion control, are used to produce Draw rings or caps for hermetic relays and Vacuum circuit breakers

TYPICAL APPLICATIONS & INDUSTRIES
Marine condenser tubes
Diesel coolers
Coinage & Mesh for the paper industry
De-salination Plants
Chemical
Petrochemical
Oil & gas
Electrical resistance
Thermocouple
Heating elements for circuit breakers
Drawn parts for vacuum circuit breakers