American Society for Testing and Materials (ASTM). Current edition approved Nov. 1, 2005. Published February 2006. Originally approved in 1966. Last previous edition approved in 2000 as B 443 - 00. 8 p. This specification covers rolled nickel-chromium-molybdenum-columbium alloy (UNS N06625) and nickel-chromium-molybdenum-silicon alloy (UNS N06219)* plate, sheet, and strip