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History of the steel industry (1850–1970)
The history of the modern steel industry began in the late 1850s, but since then, steel has been basic to the world's industrial economy. This article is intended only to address the business, economic and social dimensions of the industry, since the bulk production of steel began as a result of Henry Bessemer's development of the Bessemer converter in 1857. Previously steel was very expensive to produce and only used in small expensive items such as knives, swords and armour.
==19th century trends==
The growth of pig iron output was dramatic. Britain went from 1.3 million tons in 1840 to 6.7 million in 1870 and 10.4 in 1913. The US started from a lower base, but grew faster; from 0.32 million tons in 1840, to 1.74 million in 1870, and 31.5 million in 1913. Germany went from 0.19 million tons in 1859 to 1.56 in 1871 and 19.3 in 1913. France, Belgium, Austria-Hungary, and Russia, combined, went from 2.2 million tons in 1870 to 14.1 million tons in 1913, on the eve of the World War. During the war the demand for artillery shells and other supplies caused a spurt in output and a diversion to military uses.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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