A closer look

Blowing away steel requires harnessing the fourth state of matter. A plasma cutter forces compressed gas like nitrogen through a tiny nozzle while an electrical arc instantly superheats it into a blinding stream of ionized plasma. Reaching temperatures upwards of forty thousand degrees Fahrenheit, the plasma easily liquefies thick metal plates while the high-velocity gas violently blows the molten slag out of the way, slicing through it like butter.