Ferro niobium utu paura
Te hoko wera ferro niobium utu paura
Whakaahuatanga Hua
| Matū/Koeke | FeNb | FeNb | |
| Ta+Nb≥ | 60 | 65 | |
| Iti iho i te (%) | Ta | 0.01 | 0.2 |
| Al | 1.2 | 5 | |
| Si | 1.1 | 3 | |
| C | 0.02 | 0.2 | |
| S | 0.02 | 0.1 | |
| P | 0.01 | 0.2 | |
Tiwhikete：
He aha ta maatau e whakarato：
