American Society for Testing and Materials (ASTM). Current edition approved Mar. 1, 2005. Published March 2005. Originally approved in 1967. Last previous edition approved in 2001 as B 455 – 01. 3 p. This specification establishes the requirements for extruded leaded-brass angles, channels, and other architectural shapes of solid cross section produced in Copper Alloy UNS Nos. C38000 and C38500.