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Square tubes Focusing on seamless steel pipes for 22 years, we are the source factory and look forward to cooperation. Product Introduction Introduction to square steel tubes: Square steel pipe, also known as square tube or square cold-formed hollow section steel, is a steel pipe with a square cross-section, which is made of strip steel that is rolled by process treatment. Our company mainly produces alloy square steel pipes and carbon square steel pipes.
Square steel tubes features：

• High strength: with excellent compressive, flexural, and torsional strength, able to withstand enormous external forces, ensuring structural safety.
• Strong corrosion resistance: the surface has been specially treated, with good corrosion resistance, suitable for humidity, acid and alkali and other harsh environments, which can prolong the service life.
• Good welding performance: easy to weld, can be firmly connected with other steel or components, convenient construction, improve engineering efficiency.

Uses of square steel tubes: The square steel tubes produced by our company are mainly used in the following fields:

• Construction industry: It is used to build building frameworks, such as the beam and column structure of high-rise buildings and the support system of industrial plants, which can provide stable support.
• Machinery manufacturing: manufacturing mechanical parts, such as guide rails, brackets, etc. for automation equipment.
• Transportation: It is applied to the body structure of automobiles and rail transit vehicles, which can reduce the weight of the body and ensure the strength. …
• Furniture manufacturing: Create stylish and simple furniture frames, such as tables, chairs, bed frames, etc.

Specifications and Standards

Specification	Details
Side Length (mm)	20 – 500
Wall Thickness (mm)	1 – 20
Length (m)	Customised lengths according to customer requirements.
Material Grades	Q345b, 20cr, 40cr, 15crmo. 42crmo, 27simn, Q235、Q345、20#、45# 12cr1mov, 15crmog. 12cr1movg, etc.
Standards	ASTM A335、 GB/T8163、EN 10297-1

Product advantages 

• Diversified and all-round production system ：We have built a diversified production system, covering advanced production lines such as hot expansion, hot rolling, cold rolling, cold drawing, centrifugal casting, CNC machine tools, etc. Each production line is equipped with cutting-edge equipment and mature technology, accurately controls the production process, and efficiently produces high-precision and high-quality products to meet the diverse needs of various industries.
• Direct supply from the source factory: As the source factory of centrifugal casting, we eliminate all intermediate links and directly deliver the products from the factory to the customer. Dramatically reduced product costs, allowing you to obtain high-quality centrifugal casting products at a low price, as well as more direct and rigorous control of the production process to ensure consistent product quality.
• Strict quality control system: We build a whole-process quality control system. Strict testing when purchasing raw materials to ensure that the ingredients and performance meet the standards; Multi-channel detection gates are set up in production to monitor the dimensional accuracy, mechanical properties and surface quality of products in real time; The product is fully inspected before leaving the factory, so that you can rest assured.
• Perfect after-sales: We will pay regular visits to help customers solve problems and continue to improve.

Customer feedback Customer name: An oil company
Country: Germany
Feedback: “I am very satisfied with the delivery time, I originally thought that the custom specifications would delay the time, but I didn’t expect you to ship the goods so quickly. The goods arrived in time, and our construction progress was not delayed at all, thank you!” Customer Name: Shipyard
Country: Japan
Feedback: “The quality of the goods sent every time is very stable, the specifications are the same as our requirements, the price is fair, the cost performance is quite high, and we will continue to cooperate.” Customer industry: Construction engineering company
Country: Canada
Feedback： “The tube was used as soon as I received it, and the quality was very good, the wall thickness was uniform, and the surface was smooth and there were no blemishes. The people in our project department said that this batch of goods is good, and they will ask you to order it if there is a demand in the future.”
Customer industry: Machinery manufacturing
Country：United Kingdom
Feedback: “This is our first time working with your company, and we are very satisfied with the product quality and service attitude. The dimensional accuracy of the seamless steel pipe is very high, which fully meets the needs of our steel structure project. We look forward to more cooperation opportunities in the future!”