the process serves for the preparation of tubular copper or copper alloy chills or ingot moulds for use in continuous steel casting system , including a first stage comprising the formation of an inclined shoulder on one end of a tubular blank having a rectilinear axis , by cold plastic deformation ; a second stage comprising shaping the said blank in such a way as to impart to it a curved form ; a third stage comprising subsequently introducing into the interior of the blank a mandrel having external shape and dimensions equal to those of the chill which it is desired to obtained ; a fourth stage comprising passing the blank through a die of a drawplate having dimensions such as to deform the material of the blank to cause the internal surface of the blank to adhere strictly to the external surface of the mandrel ; a fifth stage performed when the blank has traversed the die , comprising exerting a substantially axial force on the mandrel in the opposite direction from that exerted in the preceding stage , while one end of the blank is engaged on abutment sectors disposed beneath the die .