Slitted Black Circular Steel Tube

When sourcing structural components that combine industrial strength with a clean, tailored aesthetic, precision-engineered tubing is paramount. Our slitted black circular steel tube is engineered for applications demanding both durability and specific design functionality. This product is also known and supplied as a Straight Slit Black Round Tube, offering a uniform opening for various assembly and mounting needs. Clients seeking a robust black cylindrical profile with an integrated channel often refer to it as a Black Round Tube with Straight Slit. For projects requiring a conduit or structural member with a precise linear cut, our Straight Slotted Black Circular Pipe provides an ideal solution. Similarly, the Black Straight Slit Round Pipe is a synonymous product designed for seamless integration into frameworks, railings, and mechanical systems where a pre-cut slot is essential for bolts, wires, or other components.


The Slitted Black Circular Steel Tube is manufactured from high-grade carbon steel, ensuring exceptional tensile strength and resistance to deformation. The tube undergoes a meticulous slitting process to create a clean, straight aperture along its length, with tolerances held to exacting standards. A durable black oxide or powder-coated finish is applied, which not only provides a consistent matte appearance but also offers a layer of protection against corrosion and everyday wear. This combination of robust construction and precise fabrication makes the Slitted Black Circular Steel Tube a versatile choice for architects, fabricators, and engineers. Its primary function is to serve as a structural element that accommodates secondary attachments without requiring post-production modification, saving significant time and labor in assembly. The slit allows for the insertion of brackets, panels, or tabs, facilitating secure and flush mounting. Common industries utilizing this product include commercial construction for custom handrails and signage supports, industrial automation for machine guarding and sensor mounts, retail furniture for display systems, and telecommunications for cable management structures. Its standardized dimensions and reliable quality ensure predictable performance and ease of integration into both prototype and large-scale production runs.

Technical Specifications & Parameters

Our Slitted Black Circular Steel Tube is available in a range of standard sizes. Below are the core specifications that define the product's physical and material properties.

Standard Material & Finish Properties

  • Base Material: ASTM A513 Type 5 Carbon Steel
  • Yield Strength: Min. 70,000 psi (483 MPa)
  • Surface Finish: Black Oxide (Fe3O4) Coating or Matte Black Powder Coat
  • Corrosion Resistance: Provides protection against rust in indoor and mild outdoor environments.
  • Slit Tolerance: ±0.005 inches (±0.127 mm) on slit width.
  • Edge Condition: De-burred, smooth edges on the slit to prevent injury and ensure clean assembly.

Standard Available Dimensions

Outer Diameter (OD) Wall Thickness Standard Length Slit Width (Nominal)
1.00" (25.4 mm) 0.065" (1.65 mm) 12' (3.66 m) 0.125" (3.18 mm)
1.50" (38.1 mm) 0.075" (1.91 mm) 12' (3.66 m) 0.1875" (4.76 mm)
2.00" (50.8 mm) 0.083" (2.11 mm) 12' (3.66 m) 0.1875" (4.76 mm)
2.50" (63.5 mm) 0.095" (2.41 mm) 12' (3.66 m) 0.250" (6.35 mm)
3.00" (76.2 mm) 0.109" (2.77 mm) 12' (3.66 m) 0.250" (6.35 mm)

Additional Options & Customization

  • Custom Lengths: Available upon request, with cut-to-length services.
  • Alternative Finishes: Galvanized, pre-galvanized, or custom color powder coating.
  • Slit Configuration: Multiple slits or specific slit positioning can be engineered for custom orders.
  • Material Grade: Stainless steel (304 or 316) options for enhanced corrosion resistance.
  • Tolerance: Tighter tolerances available for precision applications.

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