.050in 12x18in Copper SheetAlloy 110, also known as electrolytic tough pitch (ETP) copper, is commonly used in electric current carrying applications. 110 Copper is 99. 9% pure copper with an electrical conductivity rating of 100+ % IACS. Conductivity, corrosion resistance, and ductility makes 110 Copper very versatile over a broad range of applications. 110 Copper has a poor machinability rating of 20%. It does, however, have excellent hot and cold forming characteristics. 110