Subscribe to a magazine

Tungsten

Back to article View Gallery
8 of 13
A torch uses a number of color-coded, nonconsumable tungsten electrodes for different materials, such as aluminum. Red is 1.8 to 2.2 percent thoriated tungsten (ThO2) and is for greater arc stability, higher current capacity, easy arc starting, and resistance to weld contamination. Green is pure tungsten for good arc stability and AC welding. Orange is 1.8 to 2.2 percent ceriated tungsten (CeO2) for good arc stability and easy arc starting.

Advertisement