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

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

For a spiegeleisen not more than 1 gramme of the sample should be taken, and for a ferro-manganese 0.3 gramme.

From Scientific American Supplement, No. 401, September 8, 1883 by Various

The greatest possible accuracy was thus attainable in delivering definite quantities of molten iron into the converter for a given blow, also of spiegeleisen.

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

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)