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Cast iron is made from pig iron, which is the product of melting iron ore in a blast furnace. Cast iron can be made directly from the molten pig iron or by re-melting pig iron, [4] often along with substantial quantities of iron, steel, limestone, carbon (coke) and taking various steps to remove undesirable contaminants.
In China, blast furnaces produced cast iron, which was then either converted into finished implements in a cupola furnace, or turned into wrought iron in a fining hearth. [34] If iron ores are heated with carbon to 1420–1470 K, a molten liquid is formed, an alloy of about 96.5% iron and 3.5% carbon.
Cast iron is rather brittle and unsuitable for striking implements. It can be decarburized to steel or wrought iron by heating it in air for several days. In China, these iron working methods spread northward, and by 300 BC, iron was the material of choice throughout China for most tools and weapons. [9]
Bellfounding is the casting and tuning of large bronze bells in a foundry for use such as ... were being cast in China. After 1000 CE, iron became the most commonly ...
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.
Malleable iron was used as early as the 4th century BCE, and archaeologists have found malleable iron artifacts made in China between 4th century BCE and 9th century CE. [2] By the Tang dynasty , the use of malleable iron in China waned, although there are malleable iron artifacts dating to the 9th century. [ 2 ]