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Black Coated Rectangular Pipe
In the realm of structural and mechanical fabrication, the importance of reliable, high-strength components cannot be overstated. For projects demanding durability, aesthetic appeal, and consistent performance, our Black Rectangular Steel Tube stands as a premier choice. This product, also commonly referred to as a Black Rectangular Pipe, features a sleek, uniform black oxide finish that not only provides a degree of corrosion resistance but also offers a professional, clean appearance suitable for exposed applications. The manufacturing process ensures excellent dimensional accuracy and straightness, making it ideal for constructing frames, supports, railings, and machinery. For applications requiring additional surface texture or pattern, such as non-slip features or decorative elements, our Striped Rectangular Hollow Section is an excellent alternative. Beyond its structural role, this Black Finished Rectangular Tube is prized for its weldability and ease of fabrication, allowing engineers and builders to create complex assemblies with confidence.
Crafted to meet stringent industrial standards, the Black Coated Rectangular Pipe is engineered from high-quality steel. The black coating is typically achieved through a hot-dip galvanizing and subsequent blackening process or a specialized black oxide treatment, which creates a magnetite layer (Fe³O⁴) on the surface. This layer integrates with the base metal, providing improved protection against rust in mild environments without significantly altering the part's dimensions. The rectangular hollow section design offers superior strength-to-weight ratios compared to solid bar stock, providing exceptional resistance to bending and torsional forces. This makes the Black Coated Rectangular Pipe indispensable in load-bearing structures. Its geometry also allows for efficient material use and easier integration with other flat-surfaced components. Consistent quality is maintained through rigorous testing, including checks for wall thickness uniformity, coating adhesion, and mechanical properties, ensuring every length delivered performs as specified.
Key Specifications of Black Coated Rectangular Pipe
- Material: ASTM A500 Grade B/C, S355JR, or equivalent carbon steel.
- Coating Type: Black Oxide (Blackening) or Hot-Dipped Galvanized & Painted Black.
- Standard Lengths: 20 ft (6.1m), 24 ft (7.32m), or custom cut lengths.
- Key Features: Excellent weldability, good corrosion resistance, high dimensional accuracy, clean aesthetic finish.
- Common Standards: ASTM A500, ASTM A1085, EN 10219, JIS G 3476.
Standard Size and Weight Reference Table
| Outside Dimensions (H x W) | Wall Thickness | Sectional Area | Weight per Meter | Weight per Foot |
|---|---|---|---|---|
| 50 mm x 25 mm (2" x 1") | 2.0 mm | 2.64 cm² | 2.07 kg/m | 1.39 lb/ft |
| 75 mm x 50 mm (3" x 2") | 3.0 mm | 6.71 cm² | 5.27 kg/m | 3.54 lb/ft |
| 100 mm x 50 mm (4" x 2") | 3.0 mm | 8.21 cm² | 6.45 kg/m | 4.33 lb/ft |
| 120 mm x 80 mm (4.7" x 3.1") | 4.0 mm | 14.72 cm² | 11.56 kg/m | 7.77 lb/ft |
| 150 mm x 100 mm (6" x 4") | 5.0 mm | 22.80 cm² | 17.90 kg/m | 12.02 lb/ft |
Mechanical Properties
| Property | Typical Value (ASTM A500 Gr. B) | Test Method |
|---|---|---|
| Tensile Strength, min | 58 ksi (400 MPa) | ASTM A370 |
| Yield Strength, min | 46 ksi (317 MPa) | ASTM A370 |
| Elongation in 2", min | 23% | ASTM A370 |
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