The manufacturing of copper clad steel wire began in the late 19th century after engineers discovered that coating a steel core with copper could protect the steel from corrosion while maintaining the conductor properties of copper. Early uses included telegraph wires which took advantage of copper's ability to conduct electricity over long distances. Through the 20th century, demand ... https://www.pressreleasebulletin.com/u-s-copper-clad-steel-wire-an-essential-raw-material/