Tandem MIG MAG Welding
Tandem MIG/MAG welding uses two independent wire electrodes in one process pool to achieve extremely high travel speeds. It combines MIG and MAG techniques for optimal performance.
Physico-chemical mechanism of action
Tandem MIG-MAG welding uses two separate wire electrodes that are energized independently. These electrodes supply both filler material and current simultaneously, enabling very fast travel speeds. The high speed allows efficient use of material and boosts productivity.
Metallurgical relevance & welding risks
The high travel speed can lead to insufficient melt time, resulting in lack of fusion or incomplete penetration. It also increases the risk of porosity and hot cracking because the material doesn't have enough time to homogenize. An uneven current distribution between the electrodes can cause irregular weld bead profiles.
Shop practice & action steps
To run Tandem MIG-MAG welding successfully, you need to optimize travel speed and current for each electrode. Total travel speed should be between 100 and 300 mm/min. Current must be perfectly balanced on both electrodes to get a uniform weld bead. Use a high-quality weld pool with adequate cooling to minimize porosity and hot cracking.