The 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 of working a barA section hot rolled from a billet to a form, such as round, hexagonal, octagonal, square, or rectangular, with sharp or rounded corners or edges, with a cross-sectional area of less than 16 sq in. (A solid section that is long in relation to its cross-sectional dimensions, having a completely symmetrical cross section and whose width or greatest distance between parallel faces is 3/8 in. or more).... More between contoured diesThe metal blocks into which forging impressions are machined and from which forgings are produced. while turningRemoving metal from the outside of a part by means of a tool in a lathe or similar machine tool. it 90° between blows to produce a varying rectangular cross section.