chemical propertyphysical property1Single coil weightzinc layer,Website:://.cnhousesteel.com, Ratio of zinc and aluminum2differential coatingPhosphate3Tensile testComposition content4Bending test5T5FinishingGOODSurface treatment：Phosphate treatment Acrylic acid passivation Phosphate primer Sweep sandProduction process：entry looper, pretreatment ,annesling fumace ,zinc pot ,cooling tower ,water quench tank ,skin pass,tension leveler,passivation coater,exit looper,pecoilerquality problem: Zinc scar, Zinc granule, Air knife. Exposed steelGradeChemical composition,%≤Yield strengthTensile strengthCSiMnPSTiReL/MpaRm/MpaDX51D AZ0.120.500.600.1000.0450.30270~500DX52D AZ0.120.500.600.1000.0450.30140~300270~420DX53D AZ0.120.500.600.1000.0450.30140~260270~380DX54D AZ0.120.500.600.1000.0450.30120~220270~350