| Grade |
K1Ay |
K1A |
K1 |
K2 |
| Min. Co |
99.35 |
99.30 |
99.25 |
98.30 |
| Impurities |
| Al |
- |
- |
- |
- |
| Bi |
0.0004 |
0.0005 |
- |
- |
| Fe |
0.2 |
0.3 |
0.4 |
0.6 |
| Si |
- |
- |
- |
- |
| Cd |
0.001 |
0.001 |
- |
- |
| Mn |
0.03 |
0.05 |
0.07 |
0.1 |
| Cu |
0.02 |
0.03 |
0.03 |
0.08 |
| As |
0.001 |
0.002 |
0.002 |
0.005 |
| Ni |
0.3 |
0.3 |
0.3 |
0.5 |
| Sn |
0.0004 |
0.001 |
- |
- |
| S |
0.004 |
0.004 |
0.004 |
0.01 |
| Sb |
0.0006 |
0.001 |
- |
- |
| Pb |
0.0005 |
0.0005 |
- |
- |
| C |
0.02 |
0.02 |
0.03 |
0.1 |
| P |
0.003 |
0.005 |
- |
- |
| Zn |
0.002 |
0.003 |
- |
- | |
|
|