The EN ISO 6848 standard classifies tungsten electrodes mainly based on the alloying elements doped in the electrodes and their contents, and divides tungsten electrodes into different types to standardize their performance and applications. Common classifications of tungsten electrodes in this standard include:
Pure tungsten electrode (WT): Made of high-purity tungsten, free of doping elements, suitable for AC welding, such as welding of aluminum and magnesium alloys.
Thorium Tungsten Electrode (WTTh): Tungsten is doped with about 1.5% to 2% thorium oxide, which has excellent arc initiation properties and arc stability, and is widely used in DC welding stainless steel and carbon steel.
Cerium tungsten electrode (WCe): Doped with about 1.5% to 2% cerium oxide, suitable for low-current DC soldering, easy arcing, often used for electronic components and thin plate welding.
Lanthanum tungsten electrode (WLa): Doped with about 1% to 2% lanthanum oxide, it has both good DC and AC welding performance, and is suitable for automated welding.
Zirconium tungsten electrode (WZr): Doped with about 0.8% to 1.2% zirconia, mainly used for AC welding, especially suitable for welding aluminum alloys.
Rare Earth Tungsten Electrode (WRe): Doped with a variety of rare earth oxides, excellent performance, suitable for high-end welding equipment and complex welding environments.
These classifications not only help users choose the right electrode based on the welding material and process, but also ensure that the quality and performance of the electrode meet the requirements of international standards.
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