Aluminium is a strong, durable and lightweight metal. In today's energy-conscious society, these three basic properties combine to make the metal the preferred material of construction for transport applications, where weight saving to reduce fuel consumption and to increase load carrying capacity is vital. Products like motor cars, is an obvious example. It is not surprising therefore, that the use of aluminium in all its various forms - plate, sheet, extrusions, castings and forgings - is increasing across the whole range of transport applications. The use of aluminium for automobile engine blocks and cylinder heads,