is as a type of processed manganese source to add to different types of steel. In 1774, Gane of Sweden discovered manganese particles by heating pyrolusite and charcoal in a crucible. In 1919, Dr. Carl William Soderberg of Norway invented a submerged arc furnace using self-trained electrodes.
The properties of ferromanganese vary considerably with the precise type and composition of the alloy. The density of the alloy depends slightly on the types of impurities present but is generally around 7.3 g/cm3 (0.26 lb/cu in).
| C | P | S | ||||
| FeMn85C0.2 | 85 | 0.2 | 0.8-2.0 | 0.1-0.3 | 0.02 | |
| FeMn80C0.5 | 80 | 0.5 | 0.8-2.0 | 0.1-0.3 | 0.02 | |
| FeMn80C0.7 | 80 | 0.7 | 0.8-2.0 | 0.1-0.3 | 0.02 | |
| FeMn78C1.0 | 78 | 1.0 | 0.8-2.0 | 0.15-0.35 | 0.03 | |
| FeMn78C1.5 | 78 | 1.5 | 0.8-2.0 | 0.15-0.35 | 0.03 | |
| FeMn78C2.0 | 78 | 2.0 | 0.8-2.0 | 0.15-0.35 | 0.03 | |
| FeMn75C1.5 | 75 | 1.5 | 0.8-2.0 | 0.15-0.35 | 0.03 | |
| FeMn75C2.0 | 75 | 2.0 | 0.8-2.0 | 0.15-0.35 | 0.03 | |
| FeMn78C8.0 | 78 | 8.0 | 1.0-5.0 | 0.2-0.4 | 0.03 | |
| FeMn75C7.5 | 75 | 7.5 | 1.0-5.0 | 0.2-0.4 | 0.03 | |
| FeMn73C7.0 | 73 | 7.0 | 1.0-5.0 | 0.2-0.4 | 0.03 | |
| FeMn70C7.0 | 70 | 7.0 | 1.0-5.0 | 0.2-0.4 | 0.03 | |
| FeMn65C7.0 | 6. | 7.0 | 2.5-4.5 | 0.25-0.5 | 0.03 | |
| FeMn60C7.0 | 60 | 7.0 | 2.5-4.5 | 0.3-0.5 | 0.05 | |
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