Copper is a reddish metal known for its use in ancient times before the iron age. Copper is a bacteriostatic metal with very high thermal and electrical conductivity, exceeded only by silver. It is also very resistant to corrosion due to the layer of brown-black copper oxide which forms on its surface protecting it from more extensive corrosion and isn’t magnetic. Copper has always been used for its ductility and malleability but isn’t suitable for working with the swarf due to its consistency however it can be easily recycled and has a high scrap value as it can be used to form many different alloys (as many as 400 contain copper). Copper bars are used extensively for plumbing, wiring, heating and cooling systems, wiring, radiators, connectors, brakes and bearings used in cars, trucks and marine parts.