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Wrought iron is a form of commercial iron containing less than 0.10% of carbon, less than 0.25% of impurities total of sulfur, phosphorus, silicon and manganese, and less than 2% slag by weight. [18] [19] Wrought iron is redshort or hot short if it contains sulfur in excess quantity. It has sufficient tenacity when cold, but cracks when bent or ...
The Monadnock was commissioned by Boston real estate developers Peter and Shepherd Brooks in the building boom following the Depression of 1873–79. [5] The Brooks family, which had amassed a fortune in the shipping insurance business and had been investing in Chicago real estate since 1863, had retained Chicago property manager Owen F. Aldis to manage the construction of the seven-story ...
Cast iron was not useful for items in tension like beams, where the more expensive wrought iron was preferred. Improvements in production saw the costs decrease at the same time as cast iron gained popularity. The puddling process, patented in 1784, was a relatively low cost method for producing a structural grade wrought iron.
Metal-shaping factories across the country depended on cutting tools made of crucible steel through the 1920s, when electric steel furnaces gained prominence." [ 14 ] Three companies which merged to form Crucible into the largest U.S. crucible-steel-producing company were: [ 10 ] [ 15 ]
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ISRI 203 (HMS 2): Wrought iron or steel scrap, black and galvanized, 1 ⁄ 8 inch (3.175 mm) and larger in thickness. ISRI 204 (HMS 2): Same as ISRI 203 except pieces [1] must be smaller than 36 in × 18 in (914 mm × 457 mm). ISRI 205 (HMS 2): Same as ISRI 204 except it may contain automotive scrap except for thin gauge material.
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