E3 Purple Tungsten 3.2mm E3 Tungsten electrodes offer great flexibility of use. They are particularly recommended for welding steel, stainless steel, copper and brass in low or medium intensities. They also allow welding of aluminum in alternating current. Non-radioactive, they have characteristics close to the thoriated electrode. They are distinguished by a high quality of starting and ensure a good regularity in the realization of the bead. They are suitable for automatic welding.