In many cases, when aluminum has a shape, it qualifies as cast aluminum. This material will most likely have a dull, grainy look to it. The material is typically brittle and can be broken up with tools or from dropping on the ground. If the finish has a shiny appearance, the material will probably be zinc die-cast, and it will need to be sort
In some cases, car wheels might get mixed within a truckload of cast aluminum, so it is important to look for these as there is a sizable price difference. It is also important to check Cast Aluminum with a magnet. If the iron content is too high and the magnet sticks, it will be downgraded.
Tense Mixed Aluminum Castings
Shall consist of all clean aluminum castings which may contain auto and airplane castings but no ingots, and to be free of iron, brass, dirt and other non-metallic items. Oil and grease not to total more than 2%.