Plasma Torches The basic plasma cutting process involves creating an electrical channel of superheated, electrically ionized gas The plasma from the plasma cutter itself, through the work piece to be cut, thus forming a completed electric circuit back to the plasma cutter via a grounding clamp. This is accomplished by a compressed gas of oxygen, air, inert and others depending on material being cut. Plasma Torches This is blown through a focused nozzle at high speed toward the work piece. An electrical arc is then formed within the gas, between an electrode near or integrated into the gas nozzle and the work piece itself. The electrical arc ionizes some of the gas, thereby creating an electrically conductive channel of plasma. Plasma Torches As electricity from the cutter torch travels down this plasma it delivers sufficient heat to melt through the work piece. At the same time, much of the high velocity plasma and compressed gas blow the hot molten metal away this then separates and cuts through the work piece. Plasma cutting is an effective way of cutting thin and thick materials alike. Hand-held torches can usually cut up to 38 mm (1.5 in) thick steel plate. CNC computer-controlled torches can cut steel up to 150 mm (6 in) thick. Since plasma cutters produce a very hot and very localized zone to cut with, they are extremely useful for cutting sheet metal in curved or angled shapes.