transformer iron core: 1)specifications:19mm-250mm, 2)international standard 3) passed ... .5mm 4) Raw materials ( cold rolled non-oriented silicon steel coils):a) Bao steel: B50A1000, B50A1300, B50AH470, B50AH600, B50AH800, B35A270,B35A300b) ... Ann steel: 50AW1000,50AW1300c) Wu steel: 50WW1300, 50WW1000, 50WW800d) Imported silicon steel such as POSCO steel4) Applicable to all kinds of iron cores for ...