Our pre-welded galvanized steel tubes (square and rectangular) offer excellent strength, toughness, plasticity, and weldability. The hot-dip galvanized coating is firmly bonded to the steel base, allowing for cold punching, rolling, wire drawing, bending, drilling, cutting, and welding without damaging the surface.
The tubes have a bright, attractive finish after galvanizing and are ideal for civil engineering, construction, scaffolding, steel towers, shipbuilding, and landslide control structures.
Materials & Grades
Q195, Q235, Q235B, Q275, Q345B, S235, S235JR, S355, S355JR, SS400, SS330, STK490, St33, St37, St52
Standards: EN10210, EN10219, DIN17100, ASTM A36, JIS G3466
Dimensions:
Square Tube: 16×16–250×250 mm
Rectangular Tube: 10×20–120×80 mm
Wall Thickness: 0.4–20 mm (varies by size)
Length: 6 m or customized
Surface Treatment: Oil, bare, black paint, galvanized
End Finish: Plain end
Processing Services:
Welding, punching, cutting, bending, decoiling
MOQ: 25 tons
Packaging & Shipping:
Bundled for export, suitable for all types of transport, or per customer request
Shipped by bulk or in 20ft/40ft containers
Payment Terms: T/T or L/C at sight
Price Terms: EXW, FOB, CIF, CFR, etc.
Specifications Table
| Profile | Size (mm) | Wall Thickness (mm) | OD Inch | OD mm |
|---|---|---|---|---|
| Square | 16×16 | 0.4–1.5 | 1/2 | 21.3 |
| Square | 20×20 | 0.4–1.5 | 3/4 | 26.9 |
| Square | 25×25 | 0.6–2.0 | 1 | 33.4 |
| Square | 30×30 | 0.6–4.0 | 1 1/2 | 48.3 |
| Square | 40×40 | 1.0–4.5 | 4 | 114.3 |
| Square | 50×50 | 1.0–5.0 | 6 | 168.3 |
| Square | 60×60 | 1.5–5.0 | 8 | 219.1 |
| Rectangular | 10×20 | 0.6–1.5 | – | – |
| Rectangular | 20×40 | 0.8–2.0 | – | – |
| Rectangular | 30×50 | 1.0–4.0 | – | – |
| Rectangular | 40×80 | 1.5–5.0 | – | – |
| Rectangular | 50×100 | 2.0–8.0 | – | – |
| Rectangular | 120×80 | 2.5–10.0 | – | – |
Note: Full size range available upon request.
Applications
These pre-welded galvanized square and rectangular steel pipes are widely used in civil engineering, architecture, scaffolding, steel towers, shipbuilding, retaining structures, and landslide prevention systems. Their high strength, corrosion resistance, and processability make them suitable for both indoor and outdoor construction projects.
