| spiegeleisen | (n) pig iron containing manganese; used as a deoxidizing agent and to raise the manganese content in making steel, Syn. spiegel iron, spiegel |
| Spiegel iron | [ G. spiegel mirror + E. iron. ] (Metal.) A fusible white cast iron containing a large amount of carbon (from three and a half to six per cent) and some manganese. When the manganese reaches twenty-five per cent and upwards it has a granular structure, and constitutes the alloy ferro manganese, largely used in the manufacture of Bessemer steel. Called also |