ASTM Standard Structural Square Tube with High Strength
Applications
This highly versatile material is extensively utilized across the global industrial construction, warehousing, manufacturing, and agricultural sectors. It is the preferred choice for building heavy-duty industrial frames, warehouse storage racks, equipment support structures, machinery guards, conveyor system frameworks, and agricultural greenhouses. Whether used in a chemical processing plant, a logistics distribution center, or an outdoor farming facility, this square tube ensures steadfast structural integrity and reliable support.



Specifications
| Parameter | Specification |
|---|---|
| Material Grade | Q235 / Q345 / ASTM A500 Grade B |
| Coating Process | Hot-Dip Galvanized |
| Standard | ASTM A123, ASTM A53, GB/T 3091, EN 10255 |
| Outer Dimension | 20mm x 20mm - 300mm x 300mm (Customizable) |
| Wall Thickness | 1.5mm - 12.0mm (Customizable) |
| Length | 6 meters, 12 meters, or Customized |
| Zinc Coating Weight | ≥ 275 g/m² (Customizable) |
| Yield Strength | ≥ 235 MPa (Q235) / ≥ 345 MPa (Q345) |
| Elongation | ≥ 24% |
Packing

FAQ
Q:CAN I GET SOME SAMPLES?
A:Yes. We can provide samples, you need to pay the sample fee and shipping cost in advance. We will refund the sample fee after you place your order. Please let us know your courier account or send us your fees and we will arrange to send you a sample.
Q:CAN YOU PRODUCE ACCORDING TO THE SAMPLES?
A:Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q:WHAT IS YOUR TERMS OF PAYMENT?
A:Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance, balance before shippment. If you have another question, pls feel free to contact us ASAP.
Q:WHAT IS YOUR TERMS OF DELIVERY?
A:EXW, FOB, CFR, CIF, DDU.
Q:CAN WE VISIT YOUR FACTORY?
A:Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.