Q235A steel wholesale - non-standard size can be processed

Production process

Q235 steel plate is mainly produced by hot rolling process, the specific process is as follows:

1.Raw material preparation: the billet (continuous casting billet or die casting billet) is heated to 1200-1250℃.

2.Roughing and finishing:

• Rough rolling stage: the billet is rolled to the middle thickness (30-50mm);

• Finishing rolling stage: Control the final rolling temperature at 850-900℃ to form the target thickness (1.5-200mm).

3.Cooling and winding: air-cooled or laminar cooling to room temperature, coil or cut into plates.

4.Surface treatment: pickling (to remove the oxide) or oil to prevent rust.

mechanical properties (GB/T 700 standard)

Implement standard control

Chemical composition (GB/T 700 Q235B)

Typical uses and application scenarios

1.Building structure

•Scene: Steel beams, stair steps, temporary supports

•Advantages: low cost, good weldability, suitable for static load structure

2.Machine building

•Scenario: Machine tool base, conveyor frame, and agricultural equipment shell

•Advantages: Easy machining, suitable for non-precision parts

3.Transportation

•Scenario: Floor of a freight car, corner parts of a container, and non-load-bearing partitions of a ship

•Limitations: Not suitable for high intensity or low temperature environments (need to be upgraded to Q345 or Q355)

4.Daily hardware

•Scenario: Inner lining of security door, shelf beam, common bolts and nuts.

•Advantages: Good cold forming performance, suitable for stamping processing.

Technical parameters and selection suggestions

With its high cost performance, easy processing and wide applicability, Q235 steel has become a universal steel for basic industries around the world. But in the selection should pay attention to:

•Low temperature environment: Q235D (-20℃ impact power standard) should be selected;

•Dynamic load scenario: Q345 (yield strength 345MPa) is recommended.

•Corrosion environment: Use galvanized sheet or weathering steel (such as 09CuPCrNi-A).

Through reasonable matching standards and processes, the economic value of Q235 steel plate can be maximized.