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雜質 元素 |
冶金用鈮粉 YS/T 258-1996 | ||
| FNb-1 | FNb-2 | FNb-3 | |
| O | 0.10 | 0.20 | 0.50 |
| H | 0.005 | 0.005 | 0.01 |
| C | 0.05 | 0.05 | 0.08 |
| N | 0.04 | 0.06 | - |
| Fe | 0.01 | 0.05 | - |
| Si | 0.005 | 0.01 | - |
| Ni | 0.005 | 0.005 | - |
| Cr | 0.005 | - | - |
| Ta | ≤0.20 | ≤0.50 | - |
| W | 0.005 | 0.01 | - |
| Mo | 0.003 | 0.005 | - |
| Ti | 0.003 | 0.005 | - |
| Mn | 0.003 | 0.005 | - |
| Cu | 0.003 | 0.005 | - |
| P | - | - | 0.01 |
| S | - | - | 0.01 |
| Zr | - | - | - |
| Al | |||
| Nb+Ta不大于 | - | - |
99 |
