Tungsten Electrode AWS Classification EWTh-2 Chemical Composition Thoriated Color Red For Material Type Copper Nickel Stainless Steel Titanium Overall Diameter 1/8 in Overall Length 7 in Welding Current Designation AC/DC Welding Processes TIG Welding (GTAW) Electrode Material Tungsten Features Provides a Stable Arc The Electrodes Contain a Nominal 2 Wt- Percent of Thorium Oxide (ThO2) Throughout the Entire Length of the Rod Used Generally on DC Negative or Straight Polarity