Copper Clad Steel mainly used in the wire industry that combines the high mechanical  resistance of steel with the conductivity and resistance to corrosion of copper.

It main purpose is to be used as a drop wire of telephone cables, and inner conductor of coaxial cables, including thin hook up cables like RG174, and CATV cable.

The main properties of these conductors include:

§ Good corrosion resistance of copper

§ High tensile strength of steel

§ Resistance against material fatigue

§ Decreased electrical resistance compared to steel

§ Much lower impedance at high frequencies than that of steel wire alone