Chromium Zirconium Copper Alloy C18150 - Chrome Copper Alloy ...Copper chromium zirconium is a heat-treatable copper alloy (UNS C18150) that combines high electrical and thermal conductivity with excellent strength and resistance to softening at elevated temperatures. It is primarily used in the welding industry for resistance welding electrodes and in the electrical industry for circuit breakers and power generation components. Its unique properties make it ideal for high-wear, high-load applications requiring a balance of conductivity, strength, and temperature resistance.