Our high-quality carbon steel rectangular tubes are available in sizes ranging from 20×10mm to 400×200mm with wall thicknesses of 0.8-12mm, manufactured from premium Q195-Q345 steel. Featuring precise right angles (90°±1°) and excellent weldability, these tubes are ideal for construction frameworks, machinery guards, and decorative applications. Custom sizes and surface treatments (galvanizing, painting, etc.) available upon request.

Produced using advanced ERW (Electric Resistance Welding) technology with fully automated forming systems and real-time dimension control, ensuring wall thickness tolerance of ±0.1mm and diagonal difference ≤1mm. Integrated with online ultrasonic testing and precision cutting systems, our production line has an annual capacity of 150,000 tons, supporting both standard and custom specifications.

In order to ensure product quality, we will arrange professional personnel to check product quality, packaging, weight, hardness, etc., according to customer requirements of product specifications, looking for high-quality and cheap cooperative factories in China, to provide customers with one-stop procurement services and quality assurance.

Excellent packaging: waterproof paper and plastic film + iron cover + at least three strapping straps + strapping straps fixed on iron or wood pallets can effectively protect products from corrosion and various climate changes during transportation. Generally speaking, we ship from Shanghai, Tianjin, Qingdao and Ningbo ports. We have worked with many experienced shipping companies for a long time to find the most suitable mode of transportation for you.