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spiegeleisen

[ spee-guhl-ahy-zuhn ]

noun

  1. a lustrous, crystalline pig iron containing a large amount of manganese, sometimes 15 percent or more, used in making steel.


spiegeleisen

/ ˈspiːɡəlˌaɪzən /

noun

  1. a type of pig iron that is rich in manganese and carbon
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of spiegeleisen1

1865–70; < German, equivalent to Spiegel mirror + Eisen iron
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Word History and Origins

Origin of spiegeleisen1

C19: German, from Spiegel mirror + Eisen iron
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Example Sentences

To the bath of molten metal thus obtained spiegeleisen or ferro-manganese is added to supply the required carbon and to otherwise act as in the Bessemer converter.

If steel was wanted a small amount of carbon, usually in the form of spiegeleisen, was introduced into the converter before the process was complete.

A small amount is used for spiegeleisen, and the rest as a flux.

Manganese itself has a value for steel-making; or, rather, for the making of spiegeleisen and ferro-manganese, which are used in the Bessemer and Siemens processes.

When all the carbon is removed, then exactly enough carbon is added by introducing molten spiegeleisen to produce steel of any desired temper with the utmost certainty.

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