B35AH250 steel surface is smooth, flat and uniform thickness can be improved fill factor core, adhesion and weldability surface of the insulating film is good, and can improve the corrosion resistance punching

B20AT1500 mainly low-carbon steel, requires a good cold bending and welding properties, as well as some of the press performance.

B20AT1200 mainly low-carbon steel, requires a good cold bending and welding properties, as well as some of the press performance.