This tungsten electrode is mainly used for welding unalloyed and high-alloy steels, aluminum, titanium, copper and magnesium alloys. Its doping element, lanthanum oxide, makes it suitable for direct current as well as alternating current welding, just like the E3®. The golden TIG welding electrode is also used in micro-plasma welding.
Colour coding with lanthanum oxide:
Black = WLa 10 – with 0.8 to 1.2 % lanthanum oxide
Gold = WLa 15 – with 1.3 to 1.7 % lanthanum oxide
Blue = WLa 20 – with 1.7 to 2.2 % lanthanum oxide
