Non-oriented electrical steel sheet, iron core, manufacturing method for iron core, motor, and manufacturing method for motor

A non-oriented electrical steel sheet comprising:

• a base steel sheet;
• and an insulating coating, characterized in that
• the base steel sheet includes, as a chemical composition, in terms of mass %,
• 1.0% or more and 5.0% or less of Si,
• 0% or more and 0.0050% or less of C,
• 0% or more and 3.0% or less of Mn,
• 0% or more and 0.30% or less of P,
• 0% or more and 0.010% or less of S,
• 0% or more and 3.0% or less of Al,
• 0% or more and 0.10% or less of Zn,
• 0% or more and 0.010% or less of N,
• 0% or more and 0.10% or less of Sn,
• 0% or more and 0.10% or less of Sb,
• 0% or more and 0.010% or less of Ca,
• 0% or more and 5.0% or less of Cr,
• 0% or more and 5.0% or less of Ni,
• 0% or more and 5.0% or less of Cu,
• 0% or more and 0.10% or less of Ce,
• 0% or more and 0.10% or less of B,
• 0% or more and 0.10% or less of O,
• 0% or more and 0.10% or less of Mg,
• 0% or more and 0.10% or less of Ti,
• 0% or more and 0.10% or less of V,
• 0% or more and 0.10% or less of Zr,
• 0% or more and 0.10% or less of Nd,
• 0% or more and 0.10% or less of Bi,
• 0% or more and 0.10% or less of W,
• 0% or more and 0.10% or less of Mo,
• 0% or more and 0.10% or less of Nb,
• 0% or more and 0.10% or less of Y, and
• a balance consisting of Fe and impurities,
• a thickness of the base steel sheet is 0.10 mm or more and 0.35 mm or less, and
• when the base steel sheet is viewed in a cross section whose cutting direction is parallel to a thickness direction, an average grain size is 10 μm or less in a surface region which ranges from a surface of the base steel sheet to 1/20 of the thickness.