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Industries & Professions /
Steel Industry Workers
Today most molten iron goes into steel. Elements such as chromium, nickel, and manganese are added to the iron. The material is then tempered—heated and cooled to make it hard and tough. Forged—hammered or squeezed—steel is strong and dense. To produce iron and steel in traditional, integrated mills, the iron is first melted in huge blast furnaces, often more than 10 stories tall. These furnaces are water-cooled steel cylinders heated by blasts from other, dome-topped cylinders that heat air for melting ore.