There are several key differences between the steel grades DD11 and DX51.
1. Dimension: DD11 is a hot-rolled steel that has a thickness ranging from 1.5mm to 12mm and a width of up to 2000mm. DX51, on the other hand, is a galvanized steel with a thickness ranging from 0.5mm to 3mm and a width of up to 1250mm.
2. Specification: DD11 conforms to the European standard EN 10111, while DX51 conforms to the European standard EN 10346.
3. Features: DD11 is known for its excellent formability, making it suitable for deep drawing and bending applications. DX51, on the other hand, is corrosion resistant due to its zinc coating and is commonly used in outdoor and humid environments.
4. Benefits: DD11 offers good weldability and is suitable for various welding methods. DX51 offers enhanced corrosion protection and a smooth surface finish.
5. Mechanical composition: DD11 has a minimum yield strength of 170 MPa and a minimum tensile strength of 340 MPa. DX51 has a minimum yield strength of 140 MPa and a minimum tensile strength of 270 MPa.
6. Chemical composition: DD11 has a low carbon content, with maximum levels of 0.12% carbon, 0.6% manganese, and 0.05% sulfur. DX51 has a low carbon content, with maximum levels of 0.19% carbon, 1.5% manganese, and 0.04% phosphorus.
7. Usage areas: DD11 is commonly used in the automotive industry, construction, and general engineering applications. DX51 is primarily used in the construction industry, roofing, cladding, and automotive parts.
8. Production limits: DD11 can be produced as coils or sheets, while DX51 is typically produced as coils.
9. Industries: DD11 is used in industries such as automotive manufacturing, construction equipment, and machinery manufacturing. DX51 is used in industries such as construction, roofing, and automotive manufacturing.
Overall, the main differences between DD11 and DX51 lie in their dimension, specification, features, mechanical and chemical compositions, uses, and production limits. Depending on the specific requirements of a project or application, one steel grade may be more suitable than the other.