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Square tube
The square tube, one of the most fundamental and efficient structural sections, plays a central role in modern steel construction, machinery manufacturing, and architectural decoration due to its symmetrical cross-section and exceptional bending/torsional resistance. We supply a comprehensive range of welded (ERW) and cold-formed square tubes, in materials from Q235B and Q355B to high-strength S355JR, strictly adhering to GB/T 6728, ASTM A500, EN 10219, and other international standards. Our products meet diverse needs from heavy-duty framing to lightweight aesthetic structures. |
Product Name: Structural Square Steel Tube (Welded & Cold Formed)
Overview
The square tube, one of the most fundamental and efficient structural sections, plays a central role in modern steel construction, machinery manufacturing, and architectural decoration due to its symmetrical cross-section and exceptional bending/torsional resistance. We supply a comprehensive range of welded (ERW) and cold-formed square tubes, in materials from Q235B and Q355B to high-strength S355JR, strictly adhering to GB/T 6728, ASTM A500, EN 10219, and other international standards. Our products cater to a diverse range of needs, from heavy-duty framing to lightweight aesthetic structures.
Technical Specifications
Parameter | Welded Square Tube (ERW) | Cold Formed Square Tube (CFS) |
Standards | GB/T 6728, ASTM A500 Gr.C, EN 10219 S355J2H | GB/T 6725, ASTM A1008, EN 10346 |
Size Range | 20×20mm ~ 500×500mm | 10×10mm ~ 300×300mm |
Wall Thickness | 1.2mm ~ 16.0mm | 0.8mm ~ 8.0mm |
Common Grades | Q195, Q235, Q355, ASTM A36, SS400 | Q235B, Q345B, S350GD+Z (Galvanized Substrate) |
Length | 6m standard, or custom cut-to-length (up to 18m) | 6m standard, or custom cut-to-length |
Process Feature | High-Frequency Welded, high weld strength, large sizes | Roll-formed from strip, high dimensional accuracy, smooth surface |
Surface Finish | Black, hot-dip galvanized, pre-galvanized | Galvanized, pre-painted, bare material |
Key Advantages
Superior Structural Efficiency: The square section provides excellent and balanced section modulus and moment of inertia about both principal axes, offering great bending and torsional resistance, ideal for building stable frames.
Aesthetic & Versatile: The clean geometric shape blends easily with other materials, is suitable for exposed architectural features, and readily accepts paints, coatings, and other finishes.
Excellent Fabrication & Connectivity: Flat surfaces facilitate easy cutting, drilling, welding, and bolting. Enables quick and robust assembly using standard connectors (gussets, cleats).
Lightweight & Cost-Effective: Offers material savings and reduced structural weight compared to solid sections, providing equivalent load capacity while lowering overall costs. Cold-formed tubes are especially suitable for weight-sensitive applications.
Primary Applications
Building Structures: Columns, beams, handrails, canopy frames, and curtain wall supports for steel structures.
Machinery & Equipment: Machine guards, equipment frames, conveyor supports, automation equipment framing.
Transportation & Vehicles: Truck body frames, bus luggage racks, public transport shelters, road guardrails.
Furniture & Displays: Frames for modern steel-wood furniture, retail display racks, exhibition booth structures.
Infrastructure: Solar PV mounting structures, communication towers, and agricultural greenhouse frames.
Get Your Square Steel Metal Tube Quote Now!
Runying Steel Group Company occasionally has low/mild/high carbon discount steel products for sale at a low price. For more information, please follow our public Facebook page (https://www.facebook.com/tangsteel) or contact our sales team directly.
RUNYING STEEL GROUP
Tel：86-315-2199609
Fax：86-315-5538212
E-mail：admin@tsrysteel.com
Central Plaza, Tangshan City
website：www.tsrysteel.com
Alibaba：https://tsrunying.en.alibaba.com
