... -1250mmFinishingWith oilProduction processUncoiler NO.1, uncoiler NO.2- welder- entry looper- pre-treatment- annealing furnace- zinc pot- cooling tower- water quench ... tank- skin pass- tension leveler- passivation coater- exit looper- recoilerGradeChemical composition,%≤Yield strengthTensile strengthTensile rateCSiMnPSTiReL/MpaRm/MpaA80mm/%DX51D+Z0 ...