Element(ppm max) | Grade FND-1 | Grade FND-2 | Grade FND-3 |
Ta |
30 |
50 | 80 |
O | 80 | 150 | 250 |
N | 30 | 40 | 50 |
C | 20 | 50 | 100 |
H | 10 | 10 | 30 |
Si | 30 | 50 | 50 |
Fe | 20 | 30 | 50 |
W | 20 | 30 | 30 |
Mo | 10 | 20 | 30 |
Ti | 10 | 20 | 30 |
Cu | 10 | 20 | 20 |
Cr | 10 | 20 | 20 |
Ni | 20 | 20 | 30 |
Al |
20 | 20 | 30 |