Big Diameter Black Rectangular Hollow Tube

For projects demanding exceptional structural integrity and a sleek, modern aesthetic, our Large Diameter Black Rectangular Tube offers an ideal solution. This premium product, also known as a Big Bore Black Rectangular Pipe, is engineered to handle significant loads while providing superior resistance to bending and torsion. Architects and engineers frequently specify this Oversized Black Rectangular Tube for applications ranging from expansive architectural frameworks and heavy-duty industrial machinery bases to robust furniture and artistic installations. Its defining feature is the generous cross-sectional area, which translates to a higher strength-to-weight ratio compared to solid sections, making it both efficient and cost-effective. The consistent black finish, typically achieved through painting or powder coating, provides a uniform appearance that is both visually striking and offers an additional layer of protection against corrosion and environmental wear. When your design calls for substantial, reliable components, this Large Size Black Rectangular Hollow Section stands as a versatile and high-performance choice.


The Big Diameter Black Rectangular Hollow Tube is manufactured to exacting standards, ensuring dimensional accuracy and reliable performance in demanding environments. Key parameters that define its capabilities include wall thickness, overall dimensions, material grade, and mechanical properties. Below is a detailed breakdown of the standard specifications and available options for this product line.

Standard Product Specifications

  • Material: High-strength carbon steel (ASTM A500 Grade B/C, ASTM A36) or structural alloy steel.
  • Surface Finish: Mill finish with subsequent black paint coating or powder coating. Other finishes like galvanization are available upon request.
  • Manufacturing Process: Electric Resistance Welding (ERW) or hot-formed seamless, ensuring a uniform structure and high weld integrity.
  • Straightness Tolerance: Compliant with ASTM A500 standards, typically not exceeding 1/8 inch in any 5 feet of length.
  • End Condition: Standard mill ends (square cut). Machined ends (mitered, beveled, drilled) can be supplied as a custom service.

Detailed Size & Technical Data

Nominal Size (H x W) Wall Thickness (t) Sectional Area (A) Weight per Foot Moment of Inertia (Ix) Section Modulus (Sx)
8" x 4" 0.375" 7.58 sq in 25.82 lb/ft 54.6 in4 13.7 in3
10" x 5" 0.500" 13.0 sq in 44.2 lb/ft 124.1 in4 24.8 in3
12" x 6" 0.500" 15.0 sq in 51.0 lb/ft 216.0 in4 36.0 in3
14" x 6" 0.625" 20.3 sq in 69.0 lb/ft 355.5 in4 50.8 in3
16" x 8" 0.750" 31.9 sq in 108.5 lb/ft 775.0 in4 96.9 in3

Note: Dimensions and weights are nominal. Tolerances adhere to ASTM A500. Custom sizes outside this range can be produced based on project requirements.

Key Mechanical Properties (ASTM A500 Grade B)

  • Tensile Strength, min: 58,000 psi (400 MPa)
  • Yield Strength, min: 42,000 psi (290 MPa)
  • Elongation in 2": 23% min

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