... Application, Technical Indexes, Performance, and SpecificationsWith the features of high strength, high firmness, good water proofing, continuous rolling, excellent corrosion resistance ... ( um )GB/T13448≥20umFilm gloss 60° (%)GB/49(ASTMD523)High middle low>70 40~70 <40Paint film flexibility Pencil hardnessGB ... We can design and manufacture according to your requirements. good quality steel sheet