Element of an induction heating apparatus suitable for receiving a coolant

An element that is suitable for use as a component of an induction heating apparatus for inductively heating a product, in particular an element of an oscillating circuit for forming an electromagnetic field, or an element placed in said electromagnetic field and through which a current induced by said electromagnetic field flows, characterized in that it comprises a first metal sheet and a second metal sheet, the two metal sheets being made of copper or a copper alloy, the first metal sheet at least partially covering a first large face of the second metal sheet, the two metal sheets being connected by a continuous peripheral weld forming a border inside which the metal sheets are mainly spaced apart and form a free space therebetween that is intended to receive a circulating coolant and in that the mechanical resistance to plastic deformation of the first metal sheet is lower than that of the second metal sheet to the extent that pressurization of the free space between the two metal sheets may cause plastic deformation of the first metal sheet without causing plastic deformation of the second metal sheet.