Niobium bar
Gemyske komposysjes:
| Unreinheden (%, ≤) | ||
| TNb-1 | TNb-2 | |
| O | 0.05 | 0.15 |
| H | - | - |
| C | 0.02 | 0.03 |
| N | 0.03 | 0.05 |
| Fe | 0.005 | 0.02 |
| Si | 0.003 | 0.005 |
| Ni | 0.005 | 0.01 |
| Cr | 0.005 | 0.005 |
| Ta | 0.1 | 0.15 |
| W | 0.005 | 0.01 |
| Mo | 0.005 | 0.005 |
| Ti | 0.005 | 0.01 |
| Mn | - | - |
| Cu | 0.002 | 0.003 |
| P | - | - |
| S | - | - |
| Zr | 0.02 | 0.02 |
| Al | 0.003 | 0.005 |
Grutte: (17±2) ×（17±2）×（450±50）mm
Fysike eigenskippen: hege temperatuer ferset en corrosie ferset.
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