| La especificación | % | Fracción de masa de material magnético% | |||||
| Al2O3 | Fe2O3 | SiO2 | TiO2 | ||||
| BFA | F | 4#80# | ≥95 | ≤0.3 | ≤1.2 | >2.4 | ≤0,05 |
| 90#150# | ≥94 | ≤0,03 | |||||
| 180#240# | ≥93 | ≤0.3 | ≤1.2 | >2.4 | ≤0,02 | ||
| P | 8#80# | ≥ 95,0 | ≤0.3 | ≤1.5 | ≤3.0 | ≤0,05 | |
| 100#150# | ≥ 94,0 | ≤0,03 | |||||
| 180#-220# | ≥ 93,0 | ≤0.3 | ≤1.5 | ≤ 3,5 | ≤0,02 | ||
| W | 1#-63# | ≥ 92,5 | ≤0.5 | ≤1.8 | ≤4.0 | - | |