Galvanized steel coil is a type of steel coil coated with a layer of zinc to enhance its corrosion resistance. The Hot-dip galvanization process forms a durable and protective zinc coating on the steel surface, which is suitable for applications in humid and corrosive environments

S350GD/S450GD is a grade of galvanized steel plate or steel material defined according to the European standard EN 10346.

DX51D refers to the coating quality of the galvanized steel coil. The “D” represents the deep drawing quality, indicating that the steel is suitable for deep drawing applications. The “X” indicates that the steel is continuous hot-dip galvanized. The number “51” indicates the minimum yield strength of the steel, which is 51,000 psi or 355 MPa.