Chemical Composition(wt.%) |
|||
Element(ppm max)
|
Grade Nb-1
|
Grade Nb-2
|
Grade Nb-3
|
Ta
|
30
|
50
|
100
|
O
|
1500
|
2000
|
3000
|
N
|
200
|
400
|
600
|
C
|
200
|
300
|
500
|
H
|
100
|
200
|
300
|
Si
|
30
|
50
|
50
|
Fe
|
40
|
60
|
60
|
W
|
20
|
30
|
30
|
Mo
|
20
|
30
|
30
|
Ti
|
20
|
30
|
30
|
Mn
|
20
|
30
|
30
|
Cu
|
20
|
30
|
30
|
Cr
|
20
|
30
|
30
|
Ni
|
20
|
30
|
30
|
Ca
|
20
|
30
|
30
|
Sn
|
20
|
30
|
30
|
Al
|
20
|
30
|
30
|
Mg
|
20
|
30
|
30
|
P
|
20
|
30
|
30
|
S
|
20
|
30
|
30
|