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Ferrosilicomanganese is a brittle alloy of iron, silicon and manganese, used in metallurgy as a steel deoxidizer. Gives the alloy impact resistance and bending brittleness. The surface of ferrosilicomanganese pieces should be free of foreign materials. Traces of non-stick materials (lime, sand), slag film, and single slag inclusions are allowed. The mass of inclusions should not exceed 0.5% of the batch mass.
| Brands (GOST) | Mass fraction, % | ||||
| Si | Mn | C | P | S | |
| no less | no more | ||||
| SiMn17(A) | 15.0 - 20.0 | 65.0 | 2.5 | 0.10 | 0.02 |
| SiMn17(B) | 15.0 - 20.0 | 65.0 | 2.5 | 0.60 | 0.02 |
At the consumer's request, class B ferrosilicomanganese is produced with a mass fraction of phosphorus every 0.05%, in grades SiMn12, SiMn17, SiMn22 up to 0.10%, and in grade SiMn25 up to 0.05%.
The designation of the ferrosilicomanganese grade includes the alloy base, mass fraction of phosphorus and size class.
| Marks (ISO) | Mass fraction, % | ||||
| Mn | Si | C | P | S | |
| no more | |||||
| SiMn12 | 60.0 - 75.0 | 10.0 - 15.0 | 3.5 | 0.35 | 0.03 |
| SiMn18 | 60.0 - 75.0 | 15.0 - 20.0 | 2.5 | 0.35 | 0.03 |
| SiMn18LP | 0.15 | ||||
| SiMn22HP | 60.0 - 75.0 | 20.0 - 25.0 | 1,6 | 0.30 | 0.03 |
| SiMn22MP | 0.15 | ||||
| SiMn22LP | 0.10 | ||||
| SiMn23HP | 65.0 - 75.0 | 20.0 - 25.0 | 1.0 | 0.30 | 0.03 |
| SiMn23MP | 0.15 | ||||
| SiMn23LP | 0.10 | ||||
| SiMn28 | 65.0 - 75.0 | 25.0 - 30.0 | 0.5 | 0.20 | 0.03 |
| SiMn28LP | 0.10 | ||||
| SiMn30HP | 57.0 - 67.0 | 28.0 - 35.0 | 0.1 | 0.20 | 0.03 |
| SiMn30MP | 0.10 | ||||
| SiMn30LP | 0.05 | ||||
Silicomanganese is supplied in pieces weighing no more than 20 kg or in the form of crushed and sifted particles.
ГОСТ 4756-91 (332 Кб)Котировки LME на 2023-12-12 | |||
| Алюминий |  | 2117 | -17 |
| Медь | | 8341 | -107.5 |
| Свинец |  | 2057 | 31.5 |
| Никель | | 16607 | -199 |
| Олово | | 24359 | -208 |
| Цинк | | 2407 | 7.5 |