Conventional grain-oriented silicon steels 0.3 mm thick were cold-rolled to thicknesses from 0.18 to 0.08 mm, and the magnetic properties and grain textures of these sheets were observed before and after annealing. The results indicated that the magnetic induction B8 and the coercive force Hc were 1.8 T and 25 A/m, respectively, for a sheet 0.08 mm thick after primary recrystallization. When a 0.12-mm-thick sheet was annealed for more than 6 h at 1200°C, the tertiary recrystallization had begun, and the (110) texture occupied the whole surface of the sheet. The magnetic properties of this sheet were as follows: B8=1.97 T, Hc =1.7 A/m, W12.5/50 =0.21 W/kg, and W17/50 =0.43 W/kg under the application of a tensile stress of 4 kg/mm2.
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