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RECTANGULAR STEEL PIPE AND METHOD FOR MANUFACTURING SAME, AND BUILDING STRUCTURE
RECTANGULAR STEEL PIPE AND METHOD FOR MANUFACTURING SAME, AND BUILDING STRUCTURE
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机译：矩形钢管和制造方法相同，建筑结构
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摘要
Provided are: a rectangular steel pipe that has small variation in hardness in a circumferential cross-section and excellent ductility and toughness on corner outer surfaces, and has a flat plate section; a method for manufacturing same; and a building structure. A plurality of flat plate sections 11 and a plurality of corner sections 12 are alternately formed in the pipe peripheral direction, a weld section 13 extending in the pipe axis direction is further formed, the pipe peripheral width of a melt solidified section in the weld section 13 is 1.0-1,000 μm inclusive, and the radius of curvature of the corner outer side is greater than 3.0 times and no greater than 4.0 times the average plate width. The average plate thickness t (mm) can be greater than 0.030 times the average side length H (mm).
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