Our Q235 Grade Hot Rolled Rectangular Steel Box Section Pipe is a high-quality structural tube designed for strength, durability, and wide application versatility.
Manufactured using the hot-rolled process, this tube delivers excellent mechanical performance and a uniform black surface finish, making it ideal for both indoor and outdoor engineering projects.
With a standard size of 40mm × 80mm and a 1.2mm wall thickness, this rectangular steel tube offers stable load-bearing capability and reliable weldability. It conforms to major international standards such as GB / ASTM / SS400 / ST52, ensuring strong compatibility for global construction and industrial projects.
The black hot-rolled surface enhances resistance to wear and provides a clean, natural finish that is well-suited for structural frameworks, greenhouse systems, welded constructions, and general water supply structures.
Backed by large-scale monthly production capacity and fast delivery, this product is one of our best-selling hot rolled black steel rectangular tubes.
Product Specifications
| Item | Details |
|---|---|
| Product Name | Q235 Grade Hot Rolled Rectangular Steel Box Section Pipe |
| Keywords | hot rolled black rectangular steel tube |
| Material | Q235 |
| Standards | GB, ASTM, SS400, ST52 |
| Size | 40mm × 80mm |
| Thickness | 1.2mm |
| Length | 5.8m / 6m or customized |
| Type | Rectangular steel tube |
| Technology | Hot rolled |
| Surface Treatment | Black |
| Applications | Construction, welding, greenhouses, water systems |
| Best Seller | Best Selling Hot Rolled Black Steel Rectangular Tube |
| Container Type | 20GP / 20HQ or 40GP / 40HQ |
| Loading Capacity | 25–27 tons per container |
| Packaging | Plastic caps, steel bundles, woven bags, or customized |
| Payment Terms | 30% TT in advance, balance before loading |
| Production Capacity | 10,000 tons per month |
| Delivery Time | 15–20 days |
| Loading Port | Tianjin Port |
