Square Mild Steel Tubing 3/4in x .065in x 12ft

Square mild steel tubing 3/4in x .065in x 12ft from ALLSTAR PERFORMANCE is the go-to structural component for fabricators, frame builders, and custom automotive enthusiasts tackling welded assemblies. Whether you're constructing roll cages, chassis braces, roll bars, or custom exhaust manifold supports, this tubing provides the rigid backbone modern performance builds demand. At 6.8 lbs per 12-foot section, it balances material economy with genuine strength—ideal for projects where every ounce and dollar count.

The 3/4-inch square profile delivers superior torsional and bending stiffness compared to round tubing of equivalent weight, making it the preferred choice for load-bearing frame members and support structures. A wall thickness of .065 inches (approximately 16 gauge) strikes the critical engineering balance: thick enough to handle welding heat and vibration without warping, yet thin enough to keep fabrication costs and weight realistic for street and competition vehicles. Mild steel composition ensures excellent weldability across all common processes—MIG, TIG, and stick—without requiring specialized filler metals or exotic heat-treat protocols, enabling both professional fabricators and serious home shop builders to work confidently.

This tubing excels in cage construction, subframe reinforcement, suspension bracing, and modular chassis projects for street machines, track cars, and off-road vehicles. The 12-foot length minimizes waste on common builds while providing flexibility to section and configure bends to your design. Post-weld, mild steel accepts paint, powder coat, or bare finish equally well, and resists corrosion adequately indoors or with minimal protective coating in dry storage. Verify your frame design and local sanctioning body rules—many racing organizations specify tubing dimensions for safety roll cages—before ordering to ensure compliance with your build category.