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ferrous

(Encyclopedia) ferrousferrousfĕrˈəs [key], iron in the +2 valence state.

carbide

(Encyclopedia) carbide, any one of a group of compounds that contain carbon and one other element that is either a metal, boron, or silicon. Generally, a carbide is prepared by heating a metal, metal…

Wood, Jethro

(Encyclopedia) Wood, Jethro, 1774–1834, American inventor, b. either in Dartmouth, Mass., or in Washington co., N.Y. In 1814, while a farmer in Cayuga co., N.Y., he patented a cast-iron plow in which…

pentlandite

(Encyclopedia) pentlanditepentlanditepĕntˈləndīt [key], yellowish-bronze, opaque mineral, a sulfide of iron and nickel, (Fe,Ni)9S8. It is found in masses nearly always associated with the iron…

density

(Encyclopedia) density, ratio of the mass of a substance to its volume, expressed, for example, in units of grams per cubic centimeter or pounds per cubic foot. The density of a pure substance varies…

hematite

(Encyclopedia) hematitehematitehĕmˈətīt [key], mineral, an oxide of iron, Fe2O3, containing about 70% metal, occurring in nature in red to reddish-brown earthy masses and in steel-gray to black…

Siegen

(Encyclopedia) Siegen, city (1994 pop. 111,845), North Rhine–Westphalia, W Germany, on the Sieg River. Iron ore is mined nearby, and the city has iron foundries. Other manufactures include leather…

Serov

(Encyclopedia) SerovSerovsyĕˈrəf [key], city (1989 pop. 104,000), E European Russia, in the eastern foothills of the Urals, on the Kakvy River. A metallurgical center, Serov produces cast iron and…