In induction heating heat develops in the workpiece not as a result of conduction, convention or radiation as in conventional heating but due to eddy currents induced in the workpiece itself. No contact is required between the workpiece and the heating coil. The heat pattern can be precisely controlled by the suitable frequency so that only the required portion or contours of the material are heated. The suitable frequency required for any particular job is determined by the type of job and current penetration depth and lies between 50-10 MHZ. Induction heating offers the possibility of partial heating, of the workpiece, through-heating or heating up to the melting temperatures within the shortest possible time.