Silicon Metal
| Gradec | Chemical Composition | ||||
| Si(%) | Impurities (%) | ||||
| Fe | Al | Ca | P | ||
| 553 | ≥98.5 | ≤0.5 | ≤0.5 | ≤0.3 | / |
| 441 | ≥99.0 | ≤0.4 | ≤0.4 | ≤0.1 | / |
| 331 | ≥99.0 | ≤0.3 | ≤0.3 | ≤0.1 | / |
| 421 | ≥99.0 | ≤0.4 | ≤0.2 | ≤0.1 | / |
| 411 | ≥99.0 | ≤0.4 | ≤0.1 | ≤0.1 | / |
| 4405 | ≥99.0 | ≤0.4 | ≤0.4 | ≤0.05 | / |
| 4402 | ≥99.0 | ≤0.4 | ≤0.4 | ≤0.02 | 30-40pm |
| 3303 | ≥99.3 | ≤0.3 | ≤0.03 | ≤0.03 | 20-50pm |
| 2502 | ≥99.4 | ≤0.25 | ≤0.25 | ≤0.02 | 20-40pm |
| 2202 | ≥99.5 | ≤0.2 | ≤0.2 | ≤0.02 | 20-40pm |
