Description
3×3 steel square tubing (SHS 76.2×76.2mm) is one of the most in-demand structural hollow sections at Sino East Steel Group. Used extensively in building frames, columns, machine bases, fencing, and solar panel mounting structures.
For a comparison of hot-dip and electro-galvanized square tube product categories, see our classification guide.
Technical Specifications
| Parameter | Value |
|---|---|
| Nominal Size | 3 inch × 3 inch (76.2 × 76.2 mm) |
| Wall Thickness | 1.5 – 6.0 mm |
| Length | Standard 6.0m / 5.8m / 12.0m |
| Material Grades | Q195, Q235B, Q345B, S235JR, S275JR, S355J0H |
| Standards | ASTM A500, EN 10219, JIS G3466 |
| Surface | Black / Pre-galvanized Z180 / Hot-dip galvanized Z275 |
| MOQ | 5 tons per specification |
Weight Chart — 3×3 Square Tube
| Wall (mm) | kg/m | kg per 6m |
|---|---|---|
| 1.5 | 3.52 | 21.1 |
| 2.0 | 4.66 | 28.0 |
| 2.5 | 5.79 | 34.7 |
| 3.0 | 6.89 | 41.3 |
| 4.0 | 9.07 | 54.4 |
Applications
- Structural columns & beams — Building frames in residential, commercial, and agricultural construction
- Machine bases — Flat sides provide easy mounting surfaces for bolts and welds
- Fencing & gate posts — Galvanized finish for outdoor perimeter fencing
- Solar panel mounting — Standardized dimensions for PV mounting systems
Price Reference — FOB Tianjin (Q2 2026)
| Specification | Finish | Price (USD/ton) |
|---|---|---|
| 3×3×2.0mm | Black | $620-660 |
| 3×3×3.0mm | Pre-Galvanized | $690-730 |
| 3×3×4.0mm | Hot-Dip Galvanized | $780-830 |
Contact us for a firm quotation.
Also Available: Need rectangular sections? Browse our 2×4 galvanized rectangular tubing — competitive tubular steel price for Manila, Cebu & Davao buyers. FOB Tianjin factory-direct pricing.
Need a Quote for This Product?
Send your specs (grade, size, quantity, destination port) — our export team replies within 10 business hours with FOB pricing.
Or WhatsApp: +86 186 2208 8833
3×3 Square Steel Tubing Specifications
| Property | Value |
|---|---|
| Outer Size | 3 x 3 inch (76.2 x 76.2 mm) |
| Wall Thickness | 1.5 – 8.0 mm |
| Standard | ASTM A500, EN 10219, GB/T 6728 |
| Grade | A500 Gr.B/C, S235JR, Q235B, Q355B |
| Length | 6m / 12m / cut to length |
| Surface | Hot-dip galvanized, pre-galvanized, black, painted |
| Weight (3x3x3.0mm) | 6.77 kg/m |
| MOQ | 5 tons |
3×3 Square Tubing FAQ
What is the weight of 3×3 square steel tubing?
A 3×3 square tube with 3mm wall weighs about 6.77 kg/m (4.55 lbs/ft). Add approximately 0.87 kg/m for each additional 1mm of wall thickness.
Is 3×3 square tubing structural grade?
Yes — ASTM A500 Gr.B/C 3×3 HSS is widely used for columns, frames, trailers and heavy structural applications.
Do you cut 3×3 square tubing to length?
Yes, we supply cut-to-length service and can drill holes or apply surface treatments per your drawing.
B2B Ordering FAQ
What is the MOQ for this product?
Our standard MOQ is 5 metric tons for stock sizes. Full-container orders (20ft/40ft) get the best unit price; smaller trial orders are available for new customers.
What is the delivery time?
Stock items ship within 7-10 days after deposit. Custom sizes and special coatings take 15-25 days depending on the specification.
What trade terms do you support?
We quote FOB Tianjin as standard, and also support CIF, CFR, and DDP to major ports worldwide. Payment: T/T 30% deposit + 70% against B/L copy, or L/C at sight.
Can I get a sample before bulk order?
Yes. Sample pieces are available at cost price with shipping charged to the buyer; the sample fee is deducted from the first bulk order.
Do you provide mill test certificates?
Yes, every shipment includes MTC (Mill Test Certificate) covering chemical composition and mechanical properties, plus SGS inspection on request.
