A variety of metals can be used in welding fabrication, including steel, aluminum, stainless steel, and more. The most suitable material will depend on the specific application and its requirements. It is also important to understand that not all welders are capable of working with all types of metals, nor are they necessarily experienced with all forms of welding. Some of the most common types of welding include MIG welding, TIG welding, ARC and oxy-acetylene welding, or flux-cored arc welding. Each has strengths and weaknesses, and not all are appropriate for all types of fabrication.