What is plasma cutting
A plasma cutting system uses a plasma stream to transfer energy to a conductive work material. The plasma stream is typically formed by forcing a gas such as nitrogen, oxygen, argon — or even air — through a narrow nozzle. An electric current produced by an external power supply adds sufficient energy to the gas flow to ionize it, turning it into a plasma arc with temperatures approaching 40,000˚ F. The plasma arc cuts the workpiece by melting it, and blows away the molten metal.