... material and electric material Shanghai Daoda Electrical Alloy Material Co.,Ltd was established in 1998 and grows up to be ... for mental product,steel plants,aluminium plants,metallurgy,petroleum chemical,glass,ceramic,porcelain enamel,textile,family appliance,electronic appliance, ... 400mm.2000-Pass ISO 9001 and 14001 certificated.2007-Start Exporting to International Market Manganin product