Aluminum balls are mainly used in the stud welding industrial in place of fastness for construction, industrial and automotive. Aluminum balls made from 2017-T4 material are used in aircraft and autimotive applications where durability and weight are factors. Other tempers of 2017 Aluminum canbe supplied:T0 to T6. Aluminum balls are light in weight. ALuminum balls are available in a range of sizes,tolerances and grades of aluminum.