Aluminum It is a non-ferromagnetic metal. This metal for its correct reception, must be free of impurities. We can find it in the following pieces: beverage cans, aluminum radiators, pots, carpentry profile, cables, spray, offset and lithographic plates, car tires, motors and pistons. Contaminants: stainless steel, paste or antimony, aerosol with cap, with iron, slag, incorrectly burned cable, radiator with PVC, cable with steel core etc.