... then the steel grade of galvanized steel coils can be DX51D, DX52D,DX53D,DX54D,DX56D,DX57D.Standard of ... , then the steel grade of galvanized steel coils can be 01, 02, 03, 04, 05, 06.Standard of ... then the steel grade of galvanized steel coils can be SGCC, SGCH, SGCD etc..Standard of galvanized steel ... then the steel grade of galvanized steel coils can be CS, FS, DDS, EDDS, SS etc..Different steel ...