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

Hot Products

  • Black Rectangular Tube

    Black Rectangular Tube

    China Black Rectangular Tube producted by Xinlida factory is a kind of square or rectangular section of straight seam high frequency welded steel pipe.It adopts advanced high-frequency welding technology, uniform welding seam, high strength, high production efficiency and low cost, stable product quality, fully in line with national standards and industry requirements.While ensuring a certain tensile strength, it also has excellent ductility, which makes it widely used in many fields.
  • Seamless Steel Pipe

    Seamless Steel Pipe

    The Seamless Steel Pipe manufactured by Xinlida factory, with its excellent pressure-bearing capacity and toughness, can be widely applied in high-pressure working conditions. It can be seen in petrochemical, power, water and gas transmission, mechanical manufacturing, aerospace and other fields. The wall thickness of the product can be made to 10mm-60mm, and the pipe diameter can be customized from φ57mm to φ630mm as required. The steel pipes produced by Xinlida Steel Pipe have uniform wall thickness and precise tolerance control, capable of withstanding harsh working conditions such as high pressure and heavy load. It is applicable to various occasions in the construction industry, etc.
  • Thick Galvanized Tube

    Thick Galvanized Tube

    China Thick Galvanized Tube by Xinlida factory play an irreplaceable role in many industries and become key materials to ensure engineering quality and safety.
  • Black Angle Steel

    Black Angle Steel

    For steel structure engineering, tower foundation construction, and curtain wall framework—the black angle steel you need isn't the cheap, thin-skinned, poorly sized, and rough-surfaced stuff from street vendors. Tianjin Xinlida Steel Pipe Co., Ltd., with a factory designed for an annual production capacity of 50 million tons, focuses on the core business of steel pipes and profiles, building a system of "domestic production + overseas bases + global trade." Our products are exported to Southeast Asia, the Middle East, and other overseas markets. Our core advantage: we support specification changes and quantity adjustments up to 48 hours before production, with intelligent production lines providing rapid response, minimizing material waste and capital tied up. In short—others worry about order changes, we worry about you not placing orders. Your project needs certainty, and we provide that certainty.
  • Hot-Dip Galvanized Round Pipe

    Hot-Dip Galvanized Round Pipe

    Tianjin Xinlida Steel Pipe Co., Ltd. has been deeply involved in the steel pipe industry for many years. Relying on a complete business system of domestic production + overseas bases + global trade, and leveraging the mature production capacity and international production standards of its overseas production base in the Philippines, the company has dedicated itself to developing this hot-dip galvanized round pipe. The product boasts four core advantages: long-lasting corrosion resistance, high strength, easy installation, and high cost-effectiveness. It perfectly solves industry pain points such as easy corrosion, insufficient load-bearing capacity, cumbersome construction, and high procurement costs of pipes used in outdoor, underground, coastal, and chemical areas. It is the ideal pipe choice for various engineering projects in construction, energy, and transportation.
  • Flat Steel

    Flat Steel

    Xinlida Steel Pipe Company possesses comprehensive capabilities for steel rolling and processing, equipped with a full suite of advanced machinery for rolling, cutting, and galvanizing. As a flat steel wholesaler, the company offers both ready-stock products and non-standard custom manufacturing services. Leveraging resources from domestic production facilities and an overseas base in the Philippines, the company’s products directly meet material requirements for lightning protection and grounding systems, embedded steel components, structural supports, and mechanical parts.

Send Inquiry

X
We use cookies to offer you a better browsing experience, analyze site traffic and personalize content. By using this site, you agree to our use of cookies. Privacy Policy
Reject Accept