Het uniforme nummeringssysteem (UNS) is een legeringsaanduidingssysteem dat algemeen wordt aanvaard in Noord-Amerika. Elk UNS-nummer heeft betrekking op een specifiek metaal of legering en definieert de specifieke chemische samenstelling ervan, of in sommige gevallen een specifieke mechanische of fysieke eigenschap.
Algemeen gebruik titanium en titaniumlegering UNS-aanduiding:
UNS R50400,R56400,R53400
| UNS-aanduiding: | AISI-kwaliteit: | NL/DIN | GB-klasse: |
| UNSR50250 | Gr1 | 3.7025 | TA1 |
| UNSR50400 | Gr2 | 3.7035 | TA2 |
| UNSR56400 | Gr5 | 3.7165 | TC4 |
| UNSR52400 | Gr7 | 3.7235 | TA9 |
| UNSR53400 | Gr12 | 3.7105 | TA10 |
Amerikaanse standaardGraad 1 ~ 38 en UNS-codeis als volgt:
| UNS-aanduiding: | AISI-kwaliteit: | Samenstelling hoofdlegering (rest: titanium) |
| UNS R50250 | Gr1 | puur titanium |
| UNS R50400 | Gr2 | puur titanium |
| UNS R50550 | Gr3 | puur titanium |
| UNS R50700 | Gr4 | puur titanium |
| UNS R56400 | Gr5 | 6%Al+4%V |
| UNS R54520 | Gr6 | 5%Al+2.5%Sn |
| UNS R52400 | Gr7 | 0,12~0,25%Pd |
| UNS R56320 | Gr9 | 3%Al+2.5%V |
| UNS R52250 | Gr11 | 0,12~0,25%Pd |
| UNS R53400 | Gr12 | 0.3%Mo+0.8%Ni |
| UNS R53413 | Gr13 | 0,5%Ni+0,05%Ru |
| UNS R53414 | Gr14 | 0,5%Ni+0,05%Ru |
| UNS R53415 | Gr15 | 0,5%Ni+0,05%Ru |
| UNS R52402 | Gr16 | 0,04~0,08%Pd |
| UNS R52252 | Gr17 | 0,04~0,08%Pd |
| UNS R56322 | Gr18 | 3%Al+2.5%V+0.04~0.08%Pd |
| UNS R58640 | Gr19 | 3%Al+8%V+6%Cr+4%Zr+4%Mo |
| UNS R58645 | Gr20 | 3%Al+8%V+6%Cr+4%Zr+4%Mo+0.04~0.08%Pd |
| UNS R58210 | Gr21 | 15%Mo+3%Al+2.7%Nb+0.25%Si |
| UNS R56407 | Gr23 | 6%Al{{2}}4%V+ELI |
| UNS R56405 | Gr24 | 6%Al+4%V+0.04~0.08%Pd |
| UNS R56403 | Gr25 | 6%Al+4%V+0,04~0,08%Pd+0,3~0,8%Ni |
| UNS R52404 | Gr26 | 0,08~0,14%Ru |
| UNS R52254 | Gr27 | 0,08~0,14%Ru |
| UNS R56323 | Gr28 | 3%Al+2.5%V+0.08~0.14%Ru |
| UNS R56404 | Gr29 | 6%Al+4%V+0.08~0.14%Ru |
| UNS R53530 | Gr30 | 0.3%Co+0.05%Pd |
| UNS R53532 | Gr31 | 0.3%Co+0.05%Pd |
| UNS R55111 | Gr32 | 5%Al+1%Sn+1%Zr+1%V+0.8%Mo |
| UNS R53442 | Gr33 | 0.4%Ni+0.015%Pd+0.025%Ru+0.15%Cr |
| UNS R53445 | Gr34 | 0.4%Ni+0.015%Pd+0.025%Ru+0.15%Cr |
| UNS R56340 | Gr35 | 4.5%Al+2%Mo+1.6%V+0.5%Fe+0.3%Si |
| UNS R58450 | Gr36 | 4,5%Nb |
| UNS R52815 | Gr37 | 1,5%Al |
| UNS R54250 | Gr38 | 4%Al+2.5%V+1.5%Fe |
