Blue Tip Lanthanated Tungsten 3.2mm 2% Lanthanum Tungsten electrodes are universal TIG electrodes that can be used in direct and alternating current. They are particularly recommended for welding pure materials or aluminum, titanium, nickel, copper and magnesium alloys. The higher rate of lanthanum oxide in their composition gives them slower wear and less current-intensive ignition. They are recommended for low currents