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spiegel-iron

Spie"gel i`ron. Etym: [G. spiegel mirror + E. iron.] (Metal.) Defn: 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 specular pig iron, spiegel, and spiegeleisen.


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