The Unified Numbering System (UNS) of metals and alloys was developed by the American National Standards Institute (ANSI) in 1974 to uniformly number commercial metals and alloys in the United States and is administered jointly by the Society of Automotive Engineers (SAE) and American Society for Testing and Materials (ASTM).

NOTE: Classes containing large number of alloys may take up to 8 sec to load
Wrought AlloysCast Alloys
Coppers (C10100 - C15999) Coppers (C80000 - C81399)
High Copper Alloys (C16000 - C19999) High Copper Alloys (C81400 - C83299)
Brasses (C20000 - C49999) Brasses (C83300 - C89999)
Bronzes (C50000 - C69999) Bronzes (C90000 - C95999)
Copper Nickels (C70000 - C73499) Copper Nickels (C96000 - C96999)
Nickel Silvers (C73500 - C79999) Nickel Silvers (C97000 - C97999)
Leaded Coppers (C98000 - C98999)
Special Alloys (C99000 - C99999)