American Society for Testing and Materials (ASTM). Current edition approved May 1, 2005. Published June 2005. Originally approved in 1983. Last previous edition approved in 2003 as B 725 – 93 (2003). 6 p. This specification covers nickel (UNS N02200) and low carbon nickel (UNS N02201 and UNS N04400) in the form of welded and annealed or welded and stress relieved pipe intended for general corrosive service and for mechanical applications.