American Society for Testing and Materials (ASTM). Current edition approved June 15, 2006. Published July 2006. Originally approved in 1962. Last previous edition approved in 2006 as A 479/A 479M – 06. 7 p. This specification covers hot- and cold-finished bars of stainless steel, including rounds, squares, and hexagons, and hot-rolled or extruded shapes such as angles, tees, and channels for use in boiler and pressure vessel construction.