(1) A forgingThe process of working metal to a desired shape by impact or pressure in hammers, forging machines (upsetters), presses, rolls, and related forming equipment. operation in which the cross section of forging stockA wrought rod, bar, or other section suitable for subsequent change in cross section by forging. is reduced and the stockThe material to be forged regardless of form. Also, an individual piece of metal used to produce a single forging. lengthened between flat or simple contour diesThe metal blocks into which forging impressions are machined and from which forgings are produced.. See also FulleringReducing the cross section of a forging between ends of stock.. (2) in heatAmount of forging stock placed in a batch-type furnace at one time. treating, the same as tempering.