Big Bore Black Rectangular Pipe

For projects demanding exceptional structural strength, dimensional stability, and a sleek, professional finish, look no further than our premium Big Bore Black Rectangular Pipe. Engineered for heavy-duty applications, this product is the optimal solution where standard-sized tubes fall short. If your specifications call for truly massive dimensions, our Large Diameter Black Rectangular Tube offers unparalleled load-bearing capacity and rigidity. For custom architectural designs or industrial frameworks requiring non-standard profiles, our range of Oversized Black Rectangular Tube provides the flexibility and size you need. This product line is also synonymous with a Large Size Black Rectangular Hollow Section, known for its excellent strength-to-weight ratio, making it ideal for modern construction and machinery. When your project's integrity depends on the robustness of its components, specify our Heavy Caliber Black Rectangular Tube for reliable, long-lasting performance.


The Big Bore Black Rectangular Pipe is manufactured to exacting international standards, ensuring consistency and reliability in every batch. The distinctive black finish is not merely aesthetic; it provides a durable layer of protection against corrosion, significantly extending the product's service life in various environmental conditions. Its large, rectangular hollow section geometry offers superior resistance to bending and torsion compared to other shapes of similar weight, making it a cornerstone material for engineers and builders.

Detailed Product Specifications

Our Big Bore Black Rectangular Pipe is available in a comprehensive range of sizes and grades. Below are the standard specifications. Custom dimensions and material grades can be accommodated upon request.

Standard Material Grades & Specifications

  • Primary Material: ASTM A500 Grade B & C, ASTM A1085, EN 10219 S355J0H/J2H
  • Surface Finish: Mill finish with a protective black oxide coating.
  • Manufacturing Process: Electric Resistance Welded (ERW) or Cold-Formed.
  • Standard Length: 20ft (6.1m) or 40ft (12.2m). Custom lengths available.
  • Edge Detail: Square-cut ends, deburred for safe handling.

Common Size & Wall Thickness Chart

Nominal Size (H x W) Outside Dimensions (inches) Wall Thickness (inches) Approx. Weight per ft (lbs)
8" x 4" 8.000 x 4.000 0.250 / 0.375 / 0.500 22.85 / 33.66 / 44.10
10" x 5" 10.000 x 5.000 0.312 / 0.438 / 0.562 31.92 / 44.16 / 55.80
12" x 6" 12.000 x 6.000 0.375 / 0.500 / 0.625 45.02 / 59.20 / 73.02
14" x 8" 14.000 x 8.000 0.375 / 0.500 / 0.625 56.48 / 74.88 / 92.92
16" x 10" 16.000 x 10.000 0.438 / 0.562 / 0.750 78.24 / 99.60 / 131.40

Key Mechanical Properties (Typical for ASTM A500 Grade B)

Property Metric Value Imperial Value
Tensile Strength (min) 400 MPa 58,000 psi
Yield Strength (min) 250 MPa 36,000 psi
Elongation (in 2") 23% min 23% min

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