Al

Aluminum consumables designed for the welding of primarily pure aluminum-based alloys, containing a maximum of 0.5% alloying elements. The addition of titanium acts as a grain refiner, providing the material with unique properties such as enhanced corrosion resistance. These characteristics make the alloy ideal for applications in the chemical, construction, and food industries, as well as in electrical engineering and metallization. The alloy is also used in spray, arc, and flame metallization.

Consumables suitable for welding aluminum and pure aluminum alloys.

Pure aluminum (i.e. with a minimum aluminum content of 99.50%) presents a face-centered cubic (fcc) microstructure.

• EN W.Nr.: EN AW-Al 99,0 (1200), EN AW-Al 99,7 (1070A), EN AW-Al 99,5 (1050A), EN AW-Al 99,5 (1350), EN AW-Al 99,8 (1080A)

The surface of a weld typically presents oxides and welding stains. This dirt, gray-black in color, consists of aluminum oxide and magnesium oxide. Before proceeding with further weld passes, it is advisable to remove these stains and oxides, as they can cause fusion defects. Removal is most effective using a wire brush, either manual or electric, that should be clean and dedicated exclusively for use on aluminum. The high melting and solidification rate of the weld metal, typical of the gas metal arc welding (GMAW) process, can lead to the entrapment of gaseous hydrogen in the welds. It is essential to carefully control this aspect to ensure optimal results. For thicker plate materials, preheating to 150 °C is necessary to ensure better performance in welding.