B50AH470 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

B35AH300 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

B35AH230 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