... ,chromated,non-skin pass,skin pass7. Steel Grade: SGCC, SGCD, CS,FS,SS,DX51D+Z DX52D+Z; S200GD, S220GD, S280GD, S350GD 8.Standard ... the perfect building material in construction for making roofing tile, steel profiles for wall partition, T-bar, studs, fireproof door, air ...