Large Diameter Black Rectangular Tube

For projects demanding exceptional structural integrity and a sleek, modern aesthetic, large diameter black rectangular tubes are the premier choice. This specialized steel profile combines high load-bearing capacity with the inherent advantages of a rectangular hollow section, making it ideal for a wide range of demanding applications in construction, heavy machinery, industrial frameworks, and architectural design. Our range includes multiple solutions to meet your specific needs, such as our Big Bore Black Rectangular Pipe, engineered for maximum internal flow or material passage. For applications requiring monumental scale, our Oversized Black Rectangular Tube provides unparalleled dimensions for grand structural elements. When specifying materials for critical frameworks, our Large Size Black Rectangular Hollow Section offers superior strength-to-weight ratios. For the most heavy-duty industrial applications, our Heavy Caliber Black Rectangular Tube is designed to withstand extreme stress and environmental challenges. Each product in this category features a durable black oxide or painted finish that provides enhanced corrosion resistance and a consistent, professional appearance.


The Large Diameter Black Rectangular Tube is defined by a precise set of engineering parameters that ensure performance and reliability. The manufacturing process involves forming high-grade steel into a rectangular profile with a consistent wall thickness, followed by a finishing treatment that bonds the black protective layer to the surface. Key attributes include high torsional rigidity, excellent moment of inertia, and a flat surface conducive to welding and joining. Available in various steel grades, such as ASTM A500 Grade B or C, and A1085, these tubes meet stringent industry standards. Below are the typical specifications for our standard range.

Typical Specifications:

  • Material: Carbon Steel (ASTM A500, A1085, or equivalent)
  • Finish: Black Oxidized / Black Painted
  • Shape: Rectangular Hollow Section (RHS)
  • Primary Advantages: High Strength, Corrosion Resistance, Aesthetic Appeal, Weldability
  • Common Standards: ASTM, EN, ISO, JIS

Standard Size & Dimension Table:

Nominal Size (H x W) Wall Thickness (t) Sectional Area Weight per Meter Moment of Inertia (Ix)
200mm x 100mm 8.0mm 45.2 cm² 35.5 kg/m 2480 cm⁴
250mm x 150mm 10.0mm 76.0 cm² 59.6 kg/m 5920 cm⁴
300mm x 200mm 12.5mm 119.0 cm² 93.4 kg/m 11900 cm⁴
400mm x 200mm 16.0mm 178.0 cm² 139.7 kg/m 25600 cm⁴
500mm x 300mm 20.0mm 304.0 cm² 238.6 kg/m 78100 cm⁴

Applications for the Large Diameter Black Rectangular Tube are extensive. In construction, it serves as primary columns, heavy-duty trusses, and support beams for bridges and multi-story buildings. The industrial sector utilizes it for machine bases, conveyor system frameworks, and material handling equipment. Architecturally, it is favored for exposed structural elements in modern designs, sculptural installations, and high-end perimeter fencing or gates where both strength and visual impact are required. Its black finish minimizes the need for further surface treatment on-site, reducing project timelines and maintenance costs.

Hot Products

  • Small Diameter Galvanized Square Tube

    Small Diameter Galvanized Square Tube

    Small Diameter Galvanized Square Tube by Xinlida manufacturer is a kind of metal pipe widely used in construction, machinery, transportation and other fields. Its core characteristics lie in its square or rectangular cross section shape and the corrosion resistance of galvanized surface.The surface of the product has been hot galvanized to enhance corrosion resistance and rust resistance, extending the service life of the product.And the hardness of steel pipes after hot dip galvanizing treatment is enhanced, which is widely used in construction and automobile fields.
  • 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.
  • Thick Galvanized Elliptical Pipe

    Thick Galvanized Elliptical Pipe

    Since its establishment in 2015, Tianjin Xinlida Steel Pipe Co., Ltd. has been deeply engaged in the field of Thick Galvanized Elliptical Pipe manufacturing. Now it has become a professional limited liability company integrating steel pipe manufacturing, processing and sales.We not only have a number of authoritative qualification certificates and complete administrative licenses, but also driven by technological innovation to maintain a leading edge in the industry competition.
  • Galvanized Square Tube

    Galvanized Square Tube

    Tianjin Xinlida Steel Pipe Co., Ltd. is specialized in producing China Galvanized square tube, which are widely used in construction, machinery, petroleum, chemical industry, electric power, transportation and other fields. the thin-wall galvanize square rectangular tube adopts a high-frequency weld process, has that characteristics of uniform welding seam, high strength, high production efficiency, low cost and the like, and is stable in product quality and in line with national standards and industrial requirements.
  • Straight Slit Black Circular Tube

    Straight Slit Black Circular Tube

    Tianjin Xinlida Steel Pipe Co., Ltd., as the leader in the industry, specializes in the production of Straight Slit Black Circular Tube. With excellent quality, its products have extensive and in-depth applications in many fields such as construction, machinery, petroleum, chemical industry, electric power, transportation, etc.
  • Natural-finish angle steel

    Natural-finish angle steel

    Tianjin Xinlida Steel Pipe Co., Ltd. has long been established in the steel profile and pipe manufacturing industry, having built an integrated operational system that encompasses standardized domestic production facilities, overseas manufacturing bases, and global import-export trade. The company specializes in Natural-finish angle steel—also known as "black" or "black-skin" angle steel—which is hot-rolled from Q235B and Q355B steel grades. Formed through high-temperature rolling, the steel retains a natural black oxide surface layer and undergoes no artificial anti-corrosion treatments such as galvanizing or painting. The product range includes both equal-leg and unequal-leg angle steels, characterized by high structural strength, excellent rigidity, superior resistance to compression and bending, ease of processing, and outstanding cost-effectiveness. As a versatile, general-purpose structural profile available in a wide array of specifications, it is highly adaptable. It is primarily used in dry indoor environments, enclosed steel structures, temporary supports, and projects where anti-corrosion treatment is applied subsequently by the user. It serves as a fundamental steel product widely utilized in construction, machinery, piping supports, and factory framework applications.

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