High magnetic density, low iron loss, grain oriented electromagnetic steel sheet and a method for making

A grain-oriented electromagnetic steel sheet exhibiting excellent magnetic flux density and excellent iron loss, said steel sheet having a rolling direction and a direction normal to said sheet, said steel sheet comprising:

• about 2.5 to 4.0 weight percent of Si,
• about 0.003 to 0.1 weight percent Mo,
• about 0.005 to 0.2 weight percent Sb, and
• about 0.005 to 0.06 weight percent of Al;
• said steel sheet further comprising:
• i) large secondary recrystallized grains each having a diameter of about 5 to 50 mm and comprising at least about 95 percent by area ratio of all crystal grains in said electromagnetic steel sheet, said large secondary recrystallized grains defining grain boundaries, said large secondary recrystallized grains each having a ›001! axis and a ›110! axis, said ›001! axis being within about 5.degree. to said rolling direction of said steel sheet and said ›110! axis being within about 5.degree. to said direction normal to said sheet;
• and
• ii) small grains each having a diameter of about 0.05 to 2 mm, said small grains each having a ›001! axis which is at an angle of about 2.degree. to 30.degree. relative to said ›001! axis of said large secondary recrystallized grains, said small grains being positioned in said large secondary recrystallized grains or at said grain boundaries defined by said large secondary recrystallized grains.