Rectangular tube-Yongli Steel

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Rectangular tube

Execution standards for rectangular tubes:
GB/T 3094-2012
GB/T 6728-2002
YB/T 4181-2008
YB/T 5301-2010
ASTM A500/A500M-16
EN 10219-1-2006
JIS G 3466
ISO 6935:2015
Hot-rolled rectangular tubes have good strength and toughness, suitable for occasions with high requirements for mechanical properties; cold-bent rectangular tubes can produce products with uniform wall thickness and complex cross-sectional shapes, meeting diverse design needs. We can provide export processing services including threading, cutting, heading, chamfering and reducing diameter, color banding, modifying markings, oil spraying and painting, packaging, and crating.

Category：

Square tube

Square Pipe

Keywords：

Rectangular tube

ivy@tjylsteelpipe.com

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Descriptions

Product Overview

Square and rectangular tubes are generally made from strip steel or steel plates through processes such as rolling and welding. Depending on the manufacturing process, they can be divided into hot-rolled and cold-bent square and rectangular tubes. Hot-rolled square and rectangular tubes have better strength and toughness and are suitable for occasions with high mechanical performance requirements; cold-bent square and rectangular tubes can produce products with uniform wall thickness and complex cross-sectional shapes to meet diverse design needs. Square and rectangular tubes come in a wide range of specifications. Common size ranges are side lengths of 8-500mm, wall thicknesses of 0.6-16mm, and lengths typically between 4000-12000mm, with 6000mm and 12000mm being the most common. Special specifications can also be customized according to customer needs.

Performance Advantages

Excellent Mechanical Properties
Square and rectangular tubes exhibit excellent bending stiffness in two principal axis directions. Compared to wide-flange H-beams and round steel pipes of the same weight or cross-sectional height, their bending stiffness has significant advantages in certain aspects. For example, in the weak axis direction, the bending stiffness of a square and rectangular tube is 2.7 times that of an H-beam, and its radius of gyration is 1.6 times that of an H-beam. This characteristic makes it perform excellently under bending forces, significantly improving the bending load-bearing capacity of the structure, especially suitable for truss member loads or members with secondary bending moments. At the same time, the larger radius of gyration helps ensure the overall stability of the member, effectively improving the load-carrying capacity of the compression member, and providing reliable support for various structures. In the construction of large steel structures such as bridges in the construction industry, square and rectangular tubes, with their good mechanical properties, can withstand enormous pressure and weight, ensuring the safety and stability of the bridge during long-term use.

Excellent Rust Resistance
Under the same length and end-closed usage conditions, square and rectangular tubes exhibit single-sided rusting. Compared to some other steels, the amount of painting and maintenance work can be reduced by about 1/3, and the rust resistance lifespan can reach about twice that of H-beams. This advantage allows square and rectangular tubes to maintain good performance in various environments, reducing the risk of structural damage due to rust, lowering maintenance costs, and reducing replacement frequency. In some humid industrial environments or coastal construction projects, the rust resistance of square and rectangular tubes makes them an ideal choice of building material, capable of withstanding the erosion of harsh environments for a long time and ensuring the service life of the structure.

Processing and Construction Advantages
Square and rectangular tubes have excellent processing properties and can undergo various processing operations such as cutting, welding, and bending according to actual needs, easily adapting to various complex design requirements. Their one-time cold-bending welding production method avoids complex box-shaped line processing technology and simplifies the construction process. This not only improves construction efficiency but also reduces engineering costs. In construction, construction personnel can quickly and conveniently process and install square and rectangular tubes, greatly shortening the construction cycle and improving the overall efficiency of the project. At the same time, the surface treatment and processing technology of square and rectangular tubes are relatively simple, making it easy to achieve large-scale standardized production, further improving production efficiency and product quality stability.

Industry Applications

Construction Industry
In the construction field, square and rectangular tubes are widely used. They can be used as load-bearing structural members such as steel structure frames, support columns, and beams to provide stable support for buildings. Whether it is the main structure of high-rise buildings or the framework construction of industrial plants, square and rectangular tubes can exert their strong mechanical performance advantages to ensure the safety and reliability of the building structure. Square and rectangular tubes are also often used to make building curtain wall skeletons, indoor and outdoor railings, and pipeline systems (such as ventilation pipes and drainage pipes). Their good processing performance allows these components to be made into various shapes and sizes according to the requirements of the building design, meeting the dual needs of building aesthetics and function. In some modern commercial buildings, curtain wall skeletons made of square and rectangular tubes not only have excellent load-bearing capacity but also showcase a simple and grand architectural style.

Mechanical Manufacturing Industry
In the mechanical manufacturing field, square and rectangular tubes also play an important role. They can be used to manufacture various mechanical components, such as the frames of automated production lines, the support structures of robotic arms, and the frames of conveyor belts. The high strength and good processing performance of square and rectangular tubes allow them to meet the strict requirements of mechanical equipment for structural strength and precision during operation. In the automotive manufacturing industry, square and rectangular tubes are often used to make key components such as car chassis and suspension systems. As an important load-bearing structure of a vehicle, the car chassis needs to have sufficient strength and stiffness to ensure the driving safety and stability of the vehicle. The application of square and rectangular tubes can reduce the weight of the chassis, improve the fuel economy of the vehicle, and ensure the strength and reliability of the chassis, improving the overall performance of the vehicle.

Electronics Industry
With the continuous development of electronic technology, the application of square and rectangular tubes in the electronics industry is also gradually increasing. They can be used to make various components of electronic products, such as casings, brackets, and heat sinks. In electronic products, casings made of square and rectangular tubes not only provide good protection for internal electronic components, preventing them from being impacted and damaged by external forces, but also play a certain role in electromagnetic shielding, ensuring the normal operation of electronic equipment. At the same time, the good heat dissipation performance of square and rectangular tubes makes them an ideal material choice for heat sinks, effectively dissipating the heat generated by electronic components and ensuring the stability and reliability of electronic equipment during long-term operation. In computers, servers, and other electronic devices, you can often see heat dissipation components made of square and rectangular tubes, providing a guarantee for the efficient operation of the equipment.

Other Industries
In addition to the industries mentioned above, square and rectangular tubes are also widely used in shipbuilding, power engineering, agriculture, chemical machinery, oil and gas transportation, and many other fields. In shipbuilding, square and rectangular tubes are used for hull structures and pipeline systems. Due to their excellent seawater corrosion resistance and high strength, they can ensure that ships can safely navigate in harsh marine environments for a long time. In power engineering, square and rectangular tubes are used as the main material for power transmission line towers. Their strong wind resistance and convenient installation greatly improve the construction efficiency and operational safety of power facilities. In agriculture, square and rectangular tubes can be used to build agricultural greenhouses and make the skeletons of agricultural vehicles; in chemical machinery and oil and gas transportation, square and rectangular tubes, with their good corrosion resistance and pressure resistance, are widely used in the manufacture of pipelines and equipment brackets.

With its excellent performance and wide applicability, square and rectangular tubes have become an indispensable important material in modern industry and construction. With the continuous advancement of technology and the continuous growth of industry demand, the application prospects of square and rectangular tubes will be even broader, playing a greater role in promoting the development of various industries.