Working With Sheet Metal Sheet Metal is a flat shaped product made from metal that can vary in thickness between 0.015cm and 6.32cm. Very thin pieces would be considered foil/leaf pieces while thicker pieces are called plates.The reason why sheet metal is widely used is because it can be easily changed in to a variety of shapes. Through a wide variety of processes sheet metal machinery and tools are used to do this....... Similar Editorial : Fact Sheet by News Canada. | Source : Advanced Home Technology