Casting Aluminium is one of the most cost effective processes for engineers requiring the characteristics and resultant benefits of Aluminium Alloys, but in a bespoke shape or form. The economies of scale really become considerable when large batches are required, as a single mould or die can be used for the production of thousands of the same product, vastly reducing the comparable costs of machining the same shape from billet. The most common casting processes are; Die Casting, Permanent Mould Casting, Green and Dry Sand Casting, Plaster Casting and Investment Casting. The grading system via composition, as well as many characteristics are carried over directly from the designations for Wrought Products.