UNS - Unified Numbering System
The Unified Numbering System - UNS - used for metals and alloys.
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The Unified Numbering System - UNS - was developed by ASTM and SAE to correlate different numbering systems for commercial metals and alloys.
The UNS number is not a specification - it is an identification number for a metal or alloy specified elsewhere. The UNS numbering categories are
| UNS Series | Metal |
|---|---|
| A00001 to A99999 2) | Aluminum and aluminum alloys |
| C00001 to C99999 2) | Copper and copper alloys |
| D00001 to D99999 1) | Specified mechanical property steels |
| E00001 to E99999 2) | Rare earth and rare earthlike metals and alloys |
| F00001 to F99999 1) | Cast irons |
| G00001 to G99999 1) | AISI and SAE carbon and alloy steels (except tool steels) |
| H00001 to H99999 1) | AISI and SAE H-steels |
| J00001 to J99999 | Cast steels (except tool steels) |
| K00001 to K99999 1) | Miscellaneous steels and ferrous alloys |
| L00001 to L99999 2) | Low-melting metals and alloys |
| M00001 to M99999 2) | Miscellaneous nonferrous metals and alloys |
| N00001 to N99999 2) | Nickel and nickel alloys |
| P00001 to P99999 2) | Precious metals and alloys |
| R00001 to R99999 2) | Reactive and refractory metals and alloys |
| S00001 to S99999 1) | Heat and corrosion resistant (stainless) steels |
| T00001 to T99999 1) | Tool steels, wrought and cast |
| W00001 to W99999 | Welding filler metals |
| Z00001 to Z99999 |
Zinc and zinc alloys |
- Ferrous metals and alloys
- Nonferrous metals and alloys
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