Primary aluminum alloys are widely used in the manufacturing of safety parts for the automotive industry. In this context, the aluminium silicon alloys are one of the most used groups of foundry alloys due to their excellent castability and good mechanical properties.
Secondary aluminum alloys are rich in impurities, in particular in iron and copper, resulting in worse mechanical properties and corrosion resistance compared to primary alloys. For these reasons, these alloys are not used when the cast part has to fulfill high mechanical property requirements. However, the use of recycled alloys brings potential energy saving and a competitive price.