American Society for Testing and Materials (ASTM). Current edition approved Nov. 1, 2005. Published December 2005. Originally approved in 1984. Last previous edition approved in 2000 as B 729 – 00. 3 p. This specification covers UNS N08020, UNS N08026, and UNS N08024 seamless, cold-worked or hot finished pipe and tube intended for general corrosive service.