(1) Forging stockA wrought rod, bar, or other section suitable for subsequent change in cross section by forging. for one workpiece cut to length. See also BlankRaw material or forging stock (also called a "slug" or "multiple") from which a forging is made.. (2) Metal removed when punching a hole in 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. (also termed “punchout”).