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

A non oriented electrical steel sheet comprising a chemical composition containing, by mass %,

• 0.005% or less of C,
• 1.0% or more and 5.0% or less of Si,
• 1.7% or less of sol. Al,
• 3.0% or less of Mn,
• 0.3% or less of P,
• 0.01% or less of S,
• 0.01% or less of N,
• 0.10% or less of B,
• 0.10% or less of O,
• 0.10% or less of Mg,
• 0.01% or less of Ca,
• 0.10% or less of Ti,
• 0.10% or less of V,
• 5.0% or less of Cr,
• 5.0% or less of Ni,
• 5.0% or less of Cu,
• 0.10% or less of Zr,
• 0.10% or less of Sn,
• 0.10% or less of Sb,
• 0.10% or less of Ce,
• 0.10% or less of Nd,
• 0.10% or less of Bi,
• 0.10% or less of W,
• 0.10% or less of Mo,
• 0.10% or less of Nb,
• 0.10% or less of Y, and
• a balance consisting of Fe and impurities, wherein
• a sheet thickness is 0.10 mm or more and 0.35 mm or less,
• an average grain size is 30 μm or more and 200 μm or less,
• an X value defined by a following expression 1 is 0.800 or more and less than 0.845, and
• an iron loss W10/1k when excited so as to be a magnetic flux density of 1.0 T at a frequency of 1 kHz is 80 W/kg or less,
• where the expression 1 is X=(2×B50L+B50C)/(3×Is) and
• where B50L denotes a magnetic flux density in a rolling direction when magnetized with a magnetizing force of 5000 A/m, B50C denotes a magnetic flux density in a transverse direction when magnetized with a magnetizing force of 5000 A/m, and Is denotes a spontaneous magnetization at room temperature.