| 摘要 |
A non-oriented electrical steel sheet has a chemical composition comprising C: not more than 0.005 mass%, Si: 2ˆ¼7 mass%, Mn: 0.03ˆ¼3 mass%, Al: not more than 3 mass%, P: not more than 0.2 mass%, S: not more than 0.005 mass%, N: not more than 0.005 mass%, Se: 0.0001ˆ¼0.0005 mass%, As: 0.0005ˆ¼0.005 mass% and the remainder being Fe and inevitable impurities, and an iron loss W 15/50 in excitation at 50 Hz and 1.5 T of not more than 3.5 W/kg and a ratio (x/t) of amount of shear drop x (mm) to thickness t (mm) in punching of steel sheet of not more than 0.15 and is excellent in the iron loss property before punching and less in the deterioration of the iron loss property by punching. |
