American Society for Testing and Materials (ASTM). Current edition approved Oct. 1, 2006. Published October 2006. Originally approved in 1965. Last previous edition approved in 2001 as B 411/ 411M – 01. 3 p. This specification establishes the requirements for copper-nickel-silicon alloy rod and bar produced from Copper Alloy UNS No. C64700 in straight lengths