Aluminium closed-die forgings – usually wrought alloys – are used primarily where the highest demands are made on safety and reliability with respect to failure, impact loading and oscillating loading.

Forgings are characterised by high dimensional accuracy (normal tolerance +/- 0.2 mm), with a uniform grain structure free from porosity; strength, elongation at fracture, toughness and fatigue strength are at a maximum when loading is in the direction of the fibres. Thus the design of the forging and the forging process have to be carried out in such a way that material flow results in a dense fibre structure.