1,welding wire ER55-B2/ER80S-B2 2,CO2 coppor coated 3,all position welding 4,ISO ... ,or the welding of steam pipe,high press Brand/ModelHJ55-B2/ ER55-B2StandardsConfirm to GB/T 8110-2008 ,Correspond to AWS ... as per customers requirements. Coppor coated CO2 welding wire ER55-B2/ER80S-B2