Copper Coated Steel Wire We manufacture flexible/hard copper coated steel wire with diameter of 0.09MM－1.60MM, conductivity rate of 18%-40%, and standard YD/T722-94. We are also able to produce according to the technical index provided by customers. The products are mainly used in the industries such as communication and electronics. They’re taken as the replacements of the special material of communication line and cable. Such replacements have the tensile strength and flexibility of the steel, and the conductivity characteristics and high frequency performance of the copper, as well as the advantages of saving copper material and reducing cost etc.