BLACK IRON (B.I.) SQUARE TUBES
Black Iron (B.I.) Square Tubes That Can Sustain Your Project’s Demand
At Global Nexus Corporation, we offer high-quality black iron steel square tubing that can withstand any project’s demand. The products we offer are made of the finest black iron available to us to ensure their durability, no matter where they are used.
Known for their reliability, our black iron square tubular steel is trusted by various professionals across different industries for their projects. Whether it’s for a construction project or any other application, our square tubes provide the perfect solution. It can also be used in heavy-duty applications, such as structural support, automobile production, and construction equipment manufacturing.
Additionally, to meet your ever-changing needs, we make sure to offer our competitively priced stainless-steel square tubing in different sizes. This ensures that you will get the right size of black iron steel square tubing for your project. It also allows for a variety of customizations, so you can be sure that the material you obtain is suitable for your exact specifications.

Applications of Black Iron Square Tubes in Different Industries
Black iron square tubes find diverse applications across various industries due to their unique properties and versatility.
Structural Support
The black iron square tube is highly trusted by experienced professionals when it comes to structural support in buildings and infrastructure. This material offers a high strength-to-weight ratio, which makes them ideal for providing stability and rigidity to structures. These tubes are commonly used in frameworks, beams, columns, and trusses, ensuring the structural integrity of bridges, industrial facilities, and high-rise buildings.
Automobile Production
Black iron square tubes are integral components in the automobile industry. They are utilized in the manufacturing of vehicle frames, chassis, and roll cages, providing excellent strength and impact resistance. These tubes also contribute to weight reduction, enhancing fuel efficiency and overall performance. Additionally, black iron square tubes are employed in exhaust systems and as structural reinforcements in various automotive parts.
Construction Equipment Manufacturing
Aside from structural support and automobile production applications, black iron square tubes play a crucial role in the production of construction equipment. They are utilized in the fabrication of heavy-duty machinery such as cranes, bulldozers, excavators, and forklifts. The tubes’ robustness and durability ensure the equipment can withstand the demanding conditions of construction sites while maintaining stability and structural integrity.
Black Iron Square Tube and Pipe Sizes
Global Nexus Corporation offers black iron (B.I.) steel tubes in a variety of sizes and gauges to meet diverse structural and industrial needs.
Black Iron Square Tube Thickness Gauge Guide
| Gauge | 24 | 22 | 21 | 20 | 18 | 17 | 16 | 14 | 12 | 10 | 8 | 7 | 6 | 4 |
| Approx. Thickness (mm) | 0.6 | 0.7 | 0.8 | 0.9 | 1.2 | 1.6 | 1.5 | 2.0 | 2.5 | 3.0 | 4.0 | 4.5 | 5.0 | 6.0 |
B.I. Tube Sizes (in MM) and Thickness Gauges
| 13mm x 13mm | 24 | 20 | 18 | 16 | |||||||
| 16mm x 16mm | 22 | 20 | 18 | 16 | 12 | ||||||
| 19mm x 19mm | 24 | 20 | 18 | 16 | 14 | 12 | 10 | ||||
| 25mm x 25mm | 24 | 20 | 18 | 16 | 14 | 12 | 10 | ||||
| 30mm x 30mm | 24 | 20 | 18 | 16 | 14 | 10 | |||||
| 38mm x 38mm | 22 | 20 | 18 | 12 | 14 | 12 | 10 | 6 | |||
| 50mm x 50mm | 22 | 20 | 18 | 16 | 14 | 12 | 10 | 8 | 6 | 4 | |
| 75mm x 75mm | 16 | 14 | 12 | 10 | 8 | 4 | |||||
| 100mm x 100mm | 14 | 10 | 8 | 4 | |||||||
| 125mm x 125mm | 8 | 4 | |||||||||
| 150mm x 150mm | 10 | 8 | 4 | ||||||||
| 300mm x 300mm | 4 |
Experience Excellence with Global Nexus: Your Trusted Source for Black Iron Square Tubing
Black iron (B.I.) square tubes are reliable because of their high strength-to-weight ratio. Whether you’re taking on a structural support, automobile production, or construction equipment manufacturing project, this material can provide the durability you’re looking for.
At Global Nexus Corporation, we offer black iron square tubing in different sizes to fit your specific needs. Our competitively priced black iron square tubes ensure exceptional quality and durability without compromising your budget. Fill out the form below to learn more about how we can help you.


