Magnetic Core: Used for Automobile Igniter. Magnetic Core:1. Materials (silicon steel sheet): a) Bao steel: B50A1000, B50A800, B50A600, B50A470, B35A550, B35A440 b) Tai steel: 50TW800, 50TW600, 50TW1000, 50TW470 c) Wu steel: 50WW1300, 50WW800, 50WW600, 50WW470, 350WW360, 350WW310. d) An steel: 50AW1300, 50AW1000, 50AW800, 50AW600, 50AW470. e) Imported silicon steel coil stocks.