operation in which an ingot is worked into a billet by the use of a forging hammer or a forging press. Coining - (1) A post-forging process-on hot or cold parts-used to attain closer... on the work. Coining dies - Dies in which the coining or sizing operation is performed. Cold-coined forging - A forging that has been restruck cold in order to hold closer face... distance tolerances, sharpen corners or outlines, reduce section thickness, flatten some particular surface, or, in non-heat-treatable alloys, increase hardness. Cold forging - Various...