Yes, aluminium sections can be welded using TIG (GTAW) or MIG (GMAW) processes, but the correct filler alloy must be used to maintain corrosion resistance and strength at the weld zone. Aluminium loses some of its temper condition in the heat-affected zone during welding, which reduces local strength – this should be accounted for in structural design. Post-weld heat treatment can restore strength where required, or designs can be adapted to avoid welding in high-stress zones. Use only tooling and consumables designated for aluminium – contamination from steel can cause porosity and reduce weld quality.
