Carbon steel square tubing is one of the most commonly used building materials in construction, machinery, infrastructure, and everyday industrial and commercial products. It offers space-saving advantages and, thanks to its high load-bearing capacity, torsional stiffness, and efficient space utilization, has become the preferred choice for countless projects worldwide.
Royal Steel Group, as a professional tubing supplier, offers a full range of carbon steel square tubing products and can provide customized processing services according to customer needs, such as pipe bending, pipe positioning, drilling, and cutting.
Detailed introduction follows.
Southeast Asia Market
Common Grades: Q195, Q235 (Equivalent to S195/S235/A53)
| Category | Popular Materials | Popular Sizes (mm) | Wall Thickness |
| Low Carbon | Q195, Q235 | 40×40, 50×50, 60×60, 120×120 | 1.2–4.0mm |
| Large Structural | Q235 | 150×150, 200×200 | 3.0–6.0mm |
| High Carbon | 45#, 65# | 40×40, 50×50, 60×60 | 2.0–5.0mm |
✔ Focus on cost-effectiveness
✔ High demand for infrastructure & factory projects
With the continuous growth of global infrastructure spending, the demand for carbon steel square tubes, structural steel tubes, and hollow steel tubes is also increasing.
Royal Steel Group is committed to:
✔ High-quality manufacturing
✔ Affordable wholesale prices
✔ Fast global delivery
✔ Customized project solutions
If you are looking for a reliable Chinese square tube supplier, Royal Steel Group is a trustworthy long-term partner.
Contact us now for a quote and project support.
ROYAL GROUP
Address
Kangsheng development industry zone,
Wuqing district, Tianjin city, China.
Hours
Monday-Sunday: 24-hour Service
Post time: Mar-02-2026