Description
Aluminum electrode with special coating for welding pure aluminum and aluminum alloys containing less than 2% alloying elements. Also suitable for cast aluminum alloys with silicon (Si) content below 7%. Ideal for welding plates with wall thickness > 2 mm. The weld beads are uniform, and slag separates easily. The INTERALU Si 5 electrode is preferably used in the horizontal position. To avoid burn-through and excessive spatter, maintain the arc as short as possible. For porosity-free welds, preheat the workpieces to 150–200 °C, especially for thicknesses over 8 mm. Electrode oscillation should be avoided during welding. Slag residues must be removed to prevent potential weld corrosion. Due to the highly hygroscopic coating, electrodes must be stored in a dry place.