A:Answer The SILVEL 140A MIG Welder does not support the use of a spool gun for aluminum welding. It is primarily designed for welding steel materials, compatible with 0.030"-0.035" flux-cored wires, and can handle metals up to 1/4" (about 6.35 mm) thick as well as thin metals, delivering clean and strong welds for both minor repairs and heavy-duty projects.
