Blank, Method For Manufacturing Structural Member, And Structural Member

Abstract: A blank (20) comprises a plurality of steel sheets. The plurality of steel sheets are arranged and joined so as to have an annular shape in a plan view of the blank (20). The plurality of steel sheets include steel sheets (21, 22). An edge portion of a first steel sheet (21) and an edge portion of a second steel sheet (22) form an overlap portion (241). Among the plurality of steel sheets, the steel sheet that constitutes a part of the blank (20) having a minimum plate thickness (tmin) is a plated steel sheet. A maximum plate thickness (tmax) of the blank (20) is in the overlap portion (241). The emissivity of surfaces (216, 226) of the steel sheets (21, 22), respectively, positioned outside the overlap portion (241) is greater than the emissivity of at least one of the other surfaces of the plurality of steel sheets.

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