When seeking robust, aesthetically versatile, and dimensionally precise structural components, professionals consistently turn to high-quality metallic hollow sections. A premier choice for architects, fabricators, and engineers is the Black Rectangular Steel Tube. This product offers an exceptional blend of strength and a clean, modern finish suitable for both visible architectural elements and heavy-duty frameworks. Similar profiles, such as the Striped Rectangular Hollow Section, provide alternative surface textures for specific design requirements. For applications demanding a straightforward, durable conduit or structural member, the standard Black Rectangular Pipe is a reliable solution. Meanwhile, projects needing enhanced visual detail or non-slip properties might benefit from the distinctive appearance of a Striped Rectangular Steel Pipe. Our range is manufactured to exacting international standards, ensuring consistent quality, excellent weldability, and superior corrosion resistance, making it ideal for construction, industrial machinery, automotive frames, and custom furniture.
The **Black Finished Rectangular Tube** is defined by its precise geometric form and protective coating. The black finish, typically achieved through hot-dip galvanizing followed by a powder coat or a durable black oxide treatment, provides a robust barrier against environmental factors, significantly extending the product's service life in both indoor and outdoor settings. This finish also delivers a uniform, non-reflective surface that is highly sought after for modern architectural designs where aesthetics are paramount. The hollow rectangular section is inherently efficient, offering a high strength-to-weight ratio that allows for lighter support structures without compromising load-bearing capacity. This makes the Black Finished Rectangular Tube a cost-effective material choice, reducing overall weight and material costs while maintaining structural integrity. Its flat sides facilitate easy connection, joining, and clamping to other components, streamlining the fabrication and installation process across countless applications.
Key Specifications & Dimensions
Our Black Finished Rectangular Tubes are available in a comprehensive range of sizes and material grades to meet diverse project specifications. Below are the standard parameters:
Common Material Grades:
- A500 Grade B & Grade C: The industry standard for cold-formed structural tubing, offering excellent strength and formability.
- A513: Typically used for mechanical and low-pressure applications, known for its precise tolerances.
- ASTM A1085: Provides enhanced strength and stiffness compared to A500, allowing for more efficient designs.
Standard Size Range (Outside Dimensions):
| Height (H) in inches/mm | Width (W) in inches/mm | Wall Thickness (WT) Schedule |
|---|---|---|
| 1" x 0.5" (25.4mm x 12.7mm) | 2" x 1" (50.8mm x 25.4mm) | Sch 40 / 3mm |
| 2" x 1" (50.8mm x 25.4mm) | 3" x 1.5" (76.2mm x 38.1mm) | Sch 40 / 3mm |
| 3" x 2" (76.2mm x 50.8mm) | 4" x 2" (101.6mm x 50.8mm) | Sch 40 / 4mm |
| 4" x 3" (101.6mm x 76.2mm) | 6" x 3" (152.4mm x 76.2mm) | Sch 40 / 5mm |
| 6" x 4" (152.4mm x 101.6mm) | 8" x 4" (203.2mm x 101.6mm) | Sch 40 / 6mm |
Technical Properties:
| Property | Typical Value (A500 Grade B) | Notes |
|---|---|---|
| Yield Strength (min) | 46,000 psi (317 MPa) | Ensures structural reliability under load. |
| Tensile Strength (min) | 58,000 psi (400 MPa) | Indicates resistance to breaking under tension. |
| Elongation | 23% min | Demonstrates good ductility and formability. |
| Finish Coating Thickness | 3-8 mils (75-200 microns) | Provides durable corrosion and UV protection. |
| Standard Lengths | 20 ft, 24 ft, 40 ft (6m, 7.3m, 12.2m) | Custom cut lengths are available upon request. |
Primary Applications
- Architectural & Construction: Exposed beams, purlins, handrails, gate frames, canopy supports, and modern façade systems.
- Industrial Machinery: Equipment frames, safety guards, conveyor system supports, and workstations.
- Transportation & Automotive: Roll cages, trailer chassis, truck bed frames, and heavy-duty racking.
- Commercial & Residential Furniture: Tables, benches, shelving units, display racks, and outdoor furniture.
- Infrastructure: Signage supports, light poles, fence posts, and utility structures.
