Ferro-manganese
Pig-iron containing from 25 to 75 per cent of manganese, employed extensively in the manufacture of mild steel by the Siemens, Bessemer, and crucible methods. See MANGANESE; SPIEGELEISEN; OPEN-HEARTH STEEL.
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Pig-iron containing from 25 to 75 per cent of manganese, employed extensively in the manufacture of mild steel by the Siemens, Bessemer, and crucible methods. See MANGANESE; SPIEGELEISEN; OPEN-HEARTH STEEL.