Grain-oriented electrical steel sheet

A grain-oriented electrical steel sheet comprising:

• a base steel sheet,
• wherein a chemical composition of the base steel sheet contains, in mass %:
• Si:
• 2.5 to 4.5%,
• Mn:
• 0.01 to 1.00%,
• N:
• 0 to 0.010%,
• C:
• 0% to 0.010%,
• sol. Al:
• 0 to 0.010%,
• one or more of S and Se:
• 0 to 0.010% in total,
• Ti:
• more than 0 to 0.010%,
• Ni:
• 0 to 1.00%,
• Cr:
• 0 to 1.00%,
• Cu:
• 0 to 1.00%,
• P:
• 0 to 0.50%,
• Mo:
• 0 to 0.10%,
• Sn:
• 0 to 0.50%,
• Sb:
• 0 to 0.50%,
• Bi:
• 0 to 0.0500%, and
• the remainder including Fe and impurities,
• when, by measuring crystal orientations at measurement points on a surface of the grain-oriented electrical steel sheet that are located at a pitch of 2 mm in a first direction and in a second direction perpendicular to the first direction using an X-ray diffraction method, misorientations of grain boundaries of crystal grains are obtained, a total length of the grain boundaries of the crystal grains is defined as La, and a total length of grain boundaries with misorientations of 1 to 5° is defined as Ls, Formula (1):
• Ls
• /
• La
• ≥
• 0
• .
• 1
• ⁢
• 4
• ⁢
• 0
• (
• 1
• )
• is satisfied, and
• a magnetic flux density B8 is 1.910 T or more.