Q235B Seamless Square Pipe

Q235B seamless square tube is a commonly used carbon structural steel seamless steel tube with a wide range of applications and excellent performance characteristics. The following is a detailed introduction to Q235B seamless square tube:

1. Material characteristics
Chemical composition: Q235B seamless square tube is mainly composed of carbon, silicon, manganese, sulfur, phosphorus and other elements, of which the carbon content is between 0.12% and 0.20%, ensuring the basic strength and hardness of the steel. At the same time, the appropriate amount of manganese improves the hardenability and strength of the steel, while the content of elements such as silicon, sulfur and phosphorus is strictly controlled to ensure the purity and processing performance of the steel.
Mechanical properties: Q235B seamless square tube has high yield strength and tensile strength, usually the yield strength is not less than 235MPa, and the tensile strength is between 375MPa and 500MPa. This enables the material to withstand large loads and impact forces, and is suitable for the manufacture of various structural parts.
Other properties: Q235B seamless square tube also has good plasticity and toughness, and can undergo certain plastic deformation when subjected to stress without breaking easily, which improves the safety and stability of the structure. At the same time, the material also has good welding performance, which is convenient for welding and connection with other steel materials, and is convenient for construction.
2. Production process
The production process of Q235B seamless square tube mainly includes steps such as raw material preparation, heating, perforation, rolling, sizing, cooling, straightening, inspection and packaging. Among them, perforation and rolling are the key steps in the production process, and the steel billet is processed into a seamless steel pipe through these two steps. During the production process, parameters such as heating temperature, rolling speed and cooling method need to be strictly controlled to ensure the dimensional accuracy and performance quality of the seamless square tube.

3. Application field
Q235B seamless square tube is favored for its excellent performance and wide application fields. The following are its main application fields:

Construction field: Q235B seamless square tube is widely used in the support, frame, beam and column of building structure, and provides reliable support for the building with its high strength and good plasticity. At the same time, the material can also be used to manufacture building components such as stairs and guardrails.
Mechanical field: In mechanical manufacturing, Q235B seamless square tubes are often used to manufacture various mechanical parts, equipment brackets, etc. to meet the requirements of mechanical strength and stability. Its good processing performance and welding performance make this material have broad application prospects in the field of mechanical manufacturing.
Automobile field: In automobile manufacturing, Q235B seamless square tubes are often used in the manufacture of body structures, chassis and other parts to improve the load-bearing capacity and safety of automobiles. The high strength and toughness of this material make the automobile structure more stable and durable.
Other fields: In addition, Q235B seamless square tubes can also be used in shipbuilding, bridge construction, chemical equipment and other fields to meet the structural requirements in various complex environments.

FAQ：

Q:Are you trading company or manufacture?
A:Both.
Q:Can I have a trial order only for several tons?
A:We can ship the regular specifications with LCL service.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free, with the cost of freight paid by customer.
Q:How long is your delivery time?
A:Generally it is 3-5 days if goods are in stock. or around 30days if the goods are not in stock and it is according to order requirement

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