American Society for Testing and Materials (ASTM). Current edition approved March 1, 2004. Published March 2004. 8 р. This specification covers bars and shapes of agehardening stainless steels. Hot-finished or cold-finished rounds, squares, hexagons, bar shapes, angles, tees, and channels are included; these shapes may be produced by hot rolling, extruding, or forging. Billets or bars for reforging may be purchased to this specification.