Grain Oriented Electrical Steel Sheet

Abstract: Provided is a grain-oriented electrical steel sheet with which it is possible to obtain sufficient magnetic flux density, and to obtain excellent iron loss characteristics before and after a magnetic domain segmentation process A base steel sheet for a grain-oriented electrical steel sheet according to the present embodiment contains, by mass, 2.5-4.5% of Si, 0.01-1.00% of Mn, 0.010% or less of N, 0.010% or less of C, 0.010% or less of sol.Al, a total of 0.010% or less of one or more elements selected from the group consisting of S and Se, and 0.010% or less of Ti, with the remainder made up by Fe and impurities. When the crystal orientation of measurement points arranged on the surface at a 2 mm pitch in mutually orthogonal first and second directions is measured by X-ray diffraction to obtain the orientation differences in the grain boundaries of crystal grains, the total length of the grain boundaries of the crystal grains is defined as La, and the total length of grain boundaries for which the orientation difference is 1-5°, from among the grain boundaries, is defined as Ls, relationship (1) is satisfied. The magnetic flux density B8 is 1.910 T or above. Relationship (1): Ls/La = 0.140

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