Designing and Fabricating Aluminum WeldmentsGas shielding opened the door for aluminum, but didn’t slam it on other joining methods. They developed, too, adding to the versatility of, and demand for aluminum. Today, joining aluminum is mainly: Fusion: gas tungsten-arc, gas metal-arc, and electron beam - all fluxless methods. Fluxless welding gives the cleanest welds, inside and out. It entraps no slag, requires no cleaning between passes. Resistance welding - spot and seam. Excellent way to join sheets for autos, appliances, trucks, air planes, space ships. Bonding - explosive, diffusion, brazing, soldering, adhesive.