American Society for Testing and Materials (ASTM). Current edition approved March 10, 2005. Published March 2005. Originally approved in 1917. Last previous edition approved in 2000 as B16–00. 8 p. This specification establishes the requirements for free-cutting brass rod, bar, wire, and shapes of any specified cross section produced from Copper Alloy UNS No. C36000 suitable for high-speed screw machining applications and moderate thread rolling.