Breaking Down the Key Differences: S235JR vs DX51

Breaking down the key differences:

1. Specification: S235JR is a structural steel grade that has a minimum yield strength of 235 N/mm². DX51 is a galvanized steel grade with a coating of zinc on its surface.

2. Features: S235JR is known for its excellent weldability, machinability, and formability. It is commonly used in construction and engineering applications. DX51, on the other hand, is highly corrosion resistant due to its zinc coating.

3. Benefits: The main benefits of S235JR include its high tensile strength, durability, and ability to withstand heavy loads. DX51 offers excellent protection against corrosion, extending the lifespan of the material.

4. Mechanical composition: S235JR contains carbon, manganese, phosphorus, sulfur, silicon, and copper. DX51 mainly consists of iron, carbon, and zinc.

5. Yield value and tensile value: The yield strength of S235JR is 235 N/mm², while DX51 does not have a specific yield strength as it is a coating grade. The tensile strength of S235JR is typically between 360-510 N/mm².

6. Chemical composition: S235JR has a maximum carbon content of 0.17%, maximum manganese content of 1.4%, maximum phosphorus content of 0.045%, and maximum sulfur content of 0.045%. DX51 has a maximum carbon content of 0.12%, maximum manganese content of 2%, maximum phosphorus content of 0.12%, and maximum sulfur content of 0.02%.

7. Usage areas: S235JR is widely used in construction, engineering, and manufacturing industries for structural applications such as beams, columns, and bridges. DX51 is commonly used in the automotive, construction, and manufacturing industries for products that require corrosion resistance, such as roofing sheets and automobile parts.

8. Production limits: S235JR is available in various forms and sizes, including plates, sheets, and bars. DX51 is produced as a coated steel product, typically in the form of coils or sheets with a zinc coating.

9. Industries: Industries that use S235JR include construction, engineering, manufacturing, and infrastructure. DX51 is commonly used in the automotive, construction, and manufacturing industries for its corrosion resistance properties.