spiegeleisen

American  

[spee-guhl-ahy-zuhn] / ˈspi gəlˌaɪ zən /

noun

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

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spiegeleisen British  

/ ˈspiːɡəlˌaɪzən /

noun

1. a type of pig iron that is rich in manganese and carbon

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Etymology

Origin of spiegeleisen

1865–70; < German, equivalent to Spiegel mirror + Eisen iron

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.

From The Romance of Industry and Invention by Cochrane, Robert

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

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" by Various

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.

From The Harris-Ingram Experiment by Bolton, Charles E. (Charles Edward)

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.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius

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.

From Inventions in the Century by Doolittle, William Henry