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Wrought iron is an iron alloy with a very low carbon content (less than 0.05%) in contrast to that of cast iron (2.1% to 4.5%). It is a semi-fused mass of iron with fibrous slag inclusions (up to 2% by weight), which give it a wood-like "grain" that is visible when it is etched, rusted, or bent to failure.
Iron and steel scrap may be added to both the blast furnace and the basic iron furnace. US Steel operates a number of integrated steel mills, including the Gary Works in Gary, Indiana . They also operate the Edgar Thomson Works , which is the iron- and steel-making unit of the Mon Valley Works, which includes three other related plants.
Other innovations followed. Engineers at the foundry invented a power-driven rolling method to weld and forge wrought iron, a process that enabled the iron company to begin producing cannon for the United States Army. [3] In the late 20th century, the company declined along with the steel and iron industry of Pennsylvania.
Stewart Iron Works is an American ironworks plant in Erlanger, Kentucky. It is one of the region's oldest manufacturing firms and at its peak was the largest iron fence maker in the world. [1] [2] Stewart's is the second-oldest iron company in continuous operation in the United States. [3]
Founded in 1865 as the Seldon and Griswold Manufacturing Company, the Griswold company became known as the premier manufacturer of high-quality cast-iron kitchen items in the United States. The Griswold cast iron foundry was based in Erie, Pennsylvania; and until the early 1900s, cast-iron items from this company were marked with an "ERIE" logo.
Wrought iron is the simplest form of iron, and is almost pure iron (typically less than 0.15% carbon). It usually contains some slag. Its uses are almost entirely obsolete, and it is no longer commercially produced. Wrought iron is very poor in fires. It is ductile, malleable and tough. It does not corrode as easily as steel.
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The Company of Undertakers for the Iron Workes [sic] in New England was founded to finance the project. [3] Winthrop selected a site in Braintree, Massachusetts (now part of present-day Quincy, Massachusetts) as the location of the first Iron Works. Construction began in 1644 and was completed in 1645. [4]
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