| Grade | Chemical Composition (%) | ||||||
| Mg | RE | Si | Ca | Al | Ti | Fe | |
| FeSiMg5RE2 | 4.0-6.0 | 1.0-3.0 | 38-44 | 2.0-3.0 | <1.0 | <0.5 | Balance |
| FeSiMg6Re1 | 5.0-7.0 | 0.5-1.5 | 38-44 | 2.0-3.0 | |||
| FeSiMg7Re1 | 6.0-8.0 | 0.5-1.5 | 38-44 | 1.0-1.5 | |||
| FeSiMg7Re3 | 6.0-8.0 | 2.0-4.0 | 38-44 | 2.0-3.5 | |||
| FeSiMg8Re3 | 7.0-9.0 | 2.0-4.0 | 38-44 | 2.0-3.5 | |||
| FeSiMg8Re5 | 7.0-9.0 | 4.0-6.0 | 38-44 | 2.0-3.5 | |||
| FeSiMg8Re7 | 7.0-9.0 | 6.0-8.0 | 38-44 | 2.0-3.5 | |||
| FeSiMg10Re7 | 9.0-11.0 | 6.0-8.0 | 38-44 | 2.0-3.5 | |||
| FeSiMg25Si40 | 25-40 | 1.5-2.0 | 40-45 | 1.0-3.5 | |||