Hot Rolled Steel Sheet

Abstract: This hot-rolled steel sheet has a desired chemical composition; the metal structure of this hot-rolled steel sheet at a position where the depth from the surface is 1/4 in the sheet thickness direction comprises, in area%, less than 3.0% of residual austenite, not less than 15.0% but less than 60.0% of ferrite and less than 5.0% of pearlite; alloy carbides in the ferrite has an average sphere equivalent radius of not less than 0.5 nm but less than 10.0 nm, and an average number density of not less than 0.10 × 1016 per cm3 but less than 1.45 × 1016 per cm3; the E value that indicates the periodicity of the metal structure is 10.7 or more; the I value that indicates the uniformity of the metal structure is 1.020 or more; and the standard deviation of the Mn concentration is 0.60% by mass or less.

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