| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide thin electromagnetic sheet steel that has proper press punching in various diameters, ranging from a small diameter to a large diameter and is superior in the high-frequency magnetic property, in which deterioration of punching dimensional accuracy, which has been of concern in the case of performing press punching to a large core, is advantageously overcome. <P>SOLUTION: The relation of the following equation is satisfied, with regard to a sheet thickness of 0.30 mm or less, and a yield point YP (N/mm<SP>2</SP>) and a sheet thickness (mm): YP × sheet thickness ≥65. <P>COPYRIGHT: (C)2003,JPO |
