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.

DX51D refers to the coating quality of the galvanized steel sheet. 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.