Tungsten Electrode AWS Classification EWLa-2 Chemical Composition 2 Percent Lanthanated Color Blue For Material Type Aluminum Carbon Steel Copper Low-Alloy Steel Magnesium Nickel Stainless Steel Titanium Overall Diameter 0.04 in Overall Length 7 in Welding Current Designation AC/DC Welding Processes TIG Welding (GTAW) Electrode Material Tungsten