Usually used in tungsten inert gas shielded welding
The most commonly used are cerium tungsten electrode (gray head) and thorium tungsten electrode (red head). The thorium tungsten electrode is concentrated than the cerium tungsten electrode, but the thorium tungsten electrode is more radioactive than the cerium tungsten electrode. The above two kinds of tungsten electrodes are widely used in welding low carbon steel, medium carbon steel, stainless steel and alloy steel. ） Pure tungsten (green head) is often used in the welding of aluminum, magnesium and its alloys. Zirconia tungsten electrode (white head) is mainly used for aluminum and aluminum alloy welding. lanthanum tungsten (golden head "wl20", sky blue head" wl15") lanthanum tungsten is widely used and suitable for welding of various materials, and the arc stability is extremely strong. The disadvantage is that the cost is high, and the price of lanthanum tungsten is a little expensive.
