spiegel iron

listen to the pronunciation of spiegel iron
English - English
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 specular pig iron, spiegel, and spiegeleisen
A fusible white cast iron containing a large amount of carbon (from three and a half to six per cent) and some manganese