What is the electrical conductivity of copper like? Copper Alloys

Copper is an excellent electrical conductor, only bettered by silver, explaining why it has been used in domestic electrical wiring for many years. The next most conductive metals are gold and aluminium, with gold being used in circuits and connectors and aluminium being used in industrial wiring due to its significantly lower cost.

The presence of any impurities, or deliberate alloying additions, will greatly reduce the electrical conductivity compared with the pure metal. Hiduron 130 (DTS 900/4805, 2.1504) has an electrical conductivity of 1.71 (mΩ/mm2), which is around 10% of the conductivity of pure copper.