graphitic pig iron

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Wrought iron — is commercially pure iron. In contrast to steel, it has a very low carbon content. It is a fibrous material due to the slag inclusions (a normal constituent). This is also what gives it a grain resembling wood, which is visible when it is etched… … Wikipedia
Cast iron — For cookware, see Cast iron cookware. Iron alloy phases Ferrite (α iron, δ iron) Austenite (γ iron) … Wikipedia
gray iron — noun : pig or cast iron containing much graphitic carbon which causes its fracture to be dark gray * * * pig iron or cast iron having much of its carbon in the form of graphite and exhibiting a gray fracture. [1655 65] * * * gray iron, a slightly … Useful english dictionary
Timeline of Russian inventions and technology records — The Hall of Space Technology in the Tsiolkovsky State Museum of the History of Cosmonautics, Kaluga, Russia. The exhibition includes the models and replicas of the following Russian inventions: the first satellite, Sputnik 1 (a ball under the… … Wikipedia

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