ASTM E 527 - 07 Standard Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)

American Society for Testing and Materials (ASTM). Current edition approved Sept. 1, 2007. Published October 2007. Originally approved in 1974. Last previous edition approved in 2003 as E 527–83 (2003). 7 p. This practice (Note 1) covers a unified numbering system (UNS) for metals and alloys that have a “commercial standing” (see Note 2), and covers the procedure by which such numbers are assigned. Section 2 describes the system of alphanumeric designations or “numbers” established for each family of metals and alloys. Section 3 outlines the organization established for administering the system. Section 5 describes the procedure for requesting number assignment to metals and alloys for which UNS numbers have not previously been assigned.