PRODUCT INFORMATION Category: Tungsten Electrodes Alloy: WW(Pure) Tungsten Class: EWP Description: Pure tungsten electrodes are used mainly with AC for welding aluminum and magnesium alloys. Can use DC, but does not provide arc initiation and arc stability as does the thoriated, ceriated, or lanthanated electrodes. Chemical Composition Pure Tungsten (EWP) minimum of 99.5 percent tungsten Contains no intentional alloying elements