1. The GTAW process relies on tungsten's hardness and high-temperature resistance to carry the welding current to the arc.040, Red, 7 In L, 10PK XTRweld Tungsten Electrode, Ground, 2% Thoriated Red, 0..
2% Ceriated Tungsten Electrode, 1/8, Gray, 3PK XTRweld Tungsten Electrode, Ground, 2% Ceriated Gray, 1/8 in. The GTAW process relies on tungsten's hardness and high-temperature resistance to carry the welding current to the arc.. 3.