These machines serve to hot deform the end, or a part, of a metal bar. With this deformation, a pre-shaping is obtained, which allows subsequent hot forging process for screws and bolts. The heating takes place throug the passing of a high current (Joule effect) and the deformation is caused by the axial thrust which determines the swelling of the areas that have attained a high temperature. The induction heat machines must therefore be able to deliver very high currents, and must also be able to develop substantial axial thrusts. Metals normally heatraceable: - Iron, steel - Stainless steel and related alloys - Brass - Titanium and its alloys - Nimonic alloys and other non-ferrous base materials