Rectangular Steel Tube

Shunchun Rectangular Steel Tubes exhibit outstanding directional bending resistance, with a large moment of inertia along the long side, resulting in more stable stress distribution. The bending stiffness of the 80×120mm model exceeds that of round pipes of the same specification by 1.8 times. Compared to solid steel of the same strength, they reduce weight by 30%-50%, which can increase range by 12% in vehicle applications. The lightweight advantage significantly reduces transportation and installation costs. The flat contact surface design allows for more connection methods, increasing installation efficiency by 40% compared to round pipes, with node connection accuracy reaching ±0.1mm. Professional surface treatment gives it excellent corrosion resistance. The hot-dip galvanized layer is ≥65μm thick and shows no red rust after 480 hours of salt spray testing, significantly extending its service life.

Shunchen Rectangular Steel Tubes are made from high-quality steel strips/plates, cold-bent and precision welded or hot-rolled. They are hollow steel sections with a standard rectangular cross-section and regular 90° internal angles. Their core functions focus on load-bearing, support, and frame construction, suitable for diverse scenarios such as construction, new energy, and vehicle industries. They combine lightweight and high strength, directly replacing traditional solid steel, achieving practical value in material saving and efficient assembly. The products exhibit excellent directional bending resistance, with a large moment of inertia along the long side, resulting in more stable stress. The 80×120mm model has a bending stiffness exceeding that of round pipes of the same specification by 1.8 times. Compared to solid steel of the same strength, they reduce weight by 30%-50%, potentially increasing range by 12% in vehicle applications. The flat contact surface design allows for more diverse connection methods, increasing installation efficiency by 40% compared to round pipes, with node connection accuracy reaching ±0.1mm. Professional surface treatment makes them corrosion-resistant and durable, with a hot-dip galvanized layer ≥65μm, showing no red rust after a 480-hour salt spray test.

Shunchen rectangular steel tubes (referred to as rectangular tubes) are hollow steel sections made from high-quality steel strips/plates through cold bending and precision welding (or hot rolling). They have a standard rectangular cross-section with regular 90° interior angles. The core functions of rectangular steel are load-bearing, support, and frame construction. Suitable for diverse applications such as construction, new energy, and vehicle industry, they offer both lightweight and high strength advantages, directly replacing traditional solid steel and achieving the core value of material saving and efficient assembly.

Key Technology Specifications Selection Table

Product application areas

1. Architectural field

Applications: Steel structure factory buildings, convention center trusses, curtain wall joists for super high-rise buildings. Case study: A provincial convention center used 150×300×8mm Q355 rectangular tubing as the main truss to achieve a 120m span, reducing the overall structural weight by 25% and shortening the construction period by 30 days.

2. New energy field

Applications: Photovoltaic support systems, internal supports for wind turbine towers. Case Study: A 100MW photovoltaic power station uses 80×40×3mm hot-dip galvanized rectangular tube supports, with a wind resistance rating of level 12, a service life of 25 years, and a 60% reduction in maintenance costs.

3. Vehicle industry

Applications: New energy commercial vehicle frames, crash beams, seat frames. Case Study: A new energy commercial vehicle uses 100×50×4mm high-strength steel rectangular tubing for its frame, resulting in an 18% weight reduction, a 12% increase in range, and a 25% improvement in collision energy absorption.

4. Industrial and municipal sectors

Applications: Streetlight poles, traffic sign poles, industrial equipment bases. Case study: A municipal road renovation project adopted 200×100×5mm rectangular tube streetlight poles, which are resistant to wind up to level 10, improve installation efficiency by 50%, and have a service life of up to 30 years.

Why choose us?

Enhanced Capacity and Delivery: With over 20,000 tons of readily available inventory and 7 branch offices providing convenient shipping, delivery cycles are only 7-15 days, far exceeding the industry average of 15-30 days. A full range of specifications are readily available, eliminating long waiting times.

More Reliable Technology and Quality: Utilizing laser-arc hybrid welding technology, the weld defect rate is <0.02%, and dimensional tolerances are controlled within ±0.1mm. Compared to the industry standard resistance welding, with a defect rate of 0.1%-0.5% and a tolerance of ±0.3mm, the quality is more stable.

More Considerate Customization and Service: Supporting full-dimensional customization of cross-sections, materials, and surface treatments, with a rapid response time of 48 hours and one-stop processing services, breaking the industry's limitations of limited customization scope and response times exceeding 72 hours.

Higher Cost-Effectiveness: Self-produced raw materials combined with intelligent production lines reduce intermediate links, resulting in lower prices for products of the same specifications compared to the industry average. 3%-5%, with superior performance, avoiding the situation where industry products are overpriced and only meet the standards; Stronger corrosion resistance: Quality is controlled by our own galvanizing plant, the hot-dip galvanized layer is ≥65μm, and there is no red rust after 480 hours of salt spray test, far exceeding the corrosion resistance standards of outsourced galvanizing, zinc layer ≤50μm, and salt spray test of about 240 hours.