American Society for Testing and Materials (ASTM). Current edition approved May 1, 2005. Published June 2005. Originally approved in 1999. Last previous edition approved in 2003 as B 393 - 03. 5 p. This specification covers five grades of wrought niobium and niobium alloy strip, sheet, and plate.
Except for dimensional tolerances in Table 1, the values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only