Overview
The 240x130x5 structural rectangular tube is a cold-formed or hot-rolled steel profile with a rectangular cross-section. Its dimensions (240mm width × 130mm height × 5mm wall thickness) make it ideal for heavy-duty applications requiring rigidity and space efficiency. Industry standards like ASTM A500 or EN 10219 often govern production. Widely used in B2B sectors, this tube balances material efficiency with structural performance. Manufacturers typically offer customizable lengths (6m or 12m standard) and surface treatments. Its hollow design reduces weight compared to solid bars while maintaining strength.
Structure and Working Principle
The tube's rectangular geometry distributes stress evenly across its flat surfaces, making it resistant to bending forces from multiple directions. The 5mm wall thickness provides optimal strength-to-weight performance for most industrial applications. During fabrication, steel coils or plates are formed into shape through roll forming or welding processes. Cold-formed variants (common for thinner walls) offer tighter tolerances, while hot-rolled tubes may have better weldability for thicker sections. Corner radii typically range from 2-4 times the wall thickness.
Key Features
Load capacity is a standout feature—this profile can support axial loads up to 1,200kN and bending moments around 45kN·m (varies by material grade). Its flat surfaces simplify connections to other components via bolting or welding. Additional advantages include fire resistance (with proper coatings) and adaptability to modifications like drilling or notching. For corrosive environments, stainless steel (e.g., 304/316 grades) or galvanized versions extend service life. The standardized dimensions ensure compatibility with modular construction systems.
Application Areas
In construction, these tubes form columns, beams, or trusses in warehouses, bridges, and high-rise buildings. Their uniformity speeds up assembly and reduces labor costs. Industrial uses include machinery frames, conveyor supports, and robotic arm structures where precise alignment is critical. The automotive and rail sectors employ them for chassis components. Agricultural equipment manufacturers value their durability for greenhouse frames or livestock enclosures.
Maintenance and Precautions
Routine inspections should check for deformation, corrosion (especially at joints), and weld integrity. Uncoated carbon steel requires protective paints or regular oiling in humid environments. During installation, avoid point loads that exceed local buckling capacity. Use proper lifting gear to prevent denting. For welded assemblies, preheat thick sections to prevent cracking. Always follow local engineering codes for load calculations and safety factors.
B2B Procurement Guide
Bulk buyers should confirm: 1) Mill test certificates for material properties, 2) Compliance with international standards (e.g., ASTM, JIS), and 3) Packaging (bundled with protective caps). MOQs typically start at 5 tons. Leading manufacturers are concentrated in China, Germany, and Japan. Request samples to verify dimensional accuracy and surface finish. For projects requiring tight tolerances, specify cold-rolled tubes. Consider just-in-time delivery to minimize storage costs for large orders.
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