| GRADE | CHEMICAL COMPOSITION（%） | ||||
| Si | Al | P | S | C | |
| ≤ | ≤ | ≤ | ≤ | ||
| FeSi75A10.5-A | 75.0-80.0 | 0.5 | 0.04 | 0.02 | 0.1 |
| FeSi75A10.5-B | 72.0-80.0 | 0.5 | 0.04 | 0.02 | 0.1 |
| FeSi75A11.5-A | 75.0-80.0 | 1.5 | 0.04 | 0.02 | 0.2 |
| FeSi75A11.5-B | 72.0-80.0 | 1.5 | 0.04 | 0.02 | 0.2 |
| FeSi75A12.0-A | 75.0-80.0 | 2 | 0.04 | 0.02 | 0.2 |
| FeSi75A12.0-B | 72.0-80.0 | 2 | 0.04 | 0.02 | 0.2 |
| FeSi75-A | 75.0-80.0 | 2 | 0.04 | 0.02 | 0.2 |
| FeSi75-B | 72.0-80.0 | 2 | 0.04 | 0.02 | 0.2 |
| FeSi65 | 65.0-72.0 | 2 | 0.04 | 0.02 | |
| FeSi45 | 40.0-47.0 | 2 | 0.04 | 0.02 | |
