Unified numbering system

The UNS number ( abbreviation for " Unified Numbering System for Metals and Alloys ") is a system in which each metal is determined with a letter and five following numbers. It is an industrial system through which can be no special properties or exact compositions derived with defined limits.

However, other names found partly in the U.S. system again, for example aluminum EN AW- 6061 EN 573-3 equivalent to U.S. A96061.

U.S. - system

  • Axxxxx - aluminum - alloy
  • Cxxxxx - copper - alloys, including bronze
  • Fxxxxx - Ferrous Materials
  • Gxxxxx - Carbon Steel
  • Hxxxxx - stainless steels (AISI H)
  • Jxxxxx - cast steels
  • Kxxxxx - High-strength steels
  • L5xxxx - Lead - alloys, including bearing metals and brazing alloys
  • M1xxxx - Magnesium - Alloys
  • Nxxxxx - nickel - alloys
  • Rxxxxx - Refractory alloys R03xxx - molybdenum
  • R04xxx - niobium
  • R05xxx Tantalum
  • R3xxxx - cobalt
  • R5xxxx - Titan
  • R6xxxx - zirconium
Aluminium American Iron and Steel Institute Titanium Chromium Tool steel Zinc
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