Square Mild Steel Tubing 1-1/2in x .083in x 12ft

Square mild steel tubing 1-1/2in x .083in x 12ft is the foundation material for custom frame fabrication, roll cage construction, and structural reinforcement in vehicle modification projects. Whether you're building a custom chassis, reinforcing a suspension geometry, or creating a full safety cage for track use, this ALLSTAR PERFORMANCE tubing delivers the mild steel stock that professional fabricators and serious DIY builders rely on. The 12-foot length provides flexibility for multiple component cuts while minimizing waste on mid-sized projects.

The 1.5-inch square profile offers superior moment of inertia compared to round tubing of equivalent wall thickness, making it ideal for load-bearing applications where bending resistance matters. The .083-inch wall thickness (.083 in gauge) provides an optimal balance between structural rigidity and weldability—thin enough to accept clean MIG or TIG welds without heat distortion, yet substantial enough to resist deformation under lateral and compressive loads common in chassis work. Mild steel's forgiving nature makes it the preferred choice for hand-fabricated builds where precise tolerance control and post-weld machining may be necessary.

This tubing suits welders and fabricators tackling frame-up restorations, tube frame conversions, and performance suspension builds where material consistency and machinability are non-negotiable. At 17.7 pounds for the 12-foot section, it's manageable for solo handling during layout and tacking operations. The straight length comes ready for cutting, bending, and welding—no straightening required on delivery. Pair this with proper joint design, appropriate wall thickness calculations for your specific load case, and quality welding technique to ensure structural integrity and longevity.