B35A210 is up to 0.8% -4.8% silicon electrical steel, after hot and cold rolled steel. Usually the thickness of 1mm or less.

B35G145 steel properties : Low iron loss, magnetic flux density under a strong magnetic field (magnetic induction) high, smooth surface, uniform thickness and smooth

B35G135 steel silicon content is about 3% to 5%, and other major iron silicon alloy.