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

Square mild steel tubing 3/4in x .065in x 12ft from ALLSTAR PERFORMANCE is a foundational structural component for custom fabrication, chassis construction, and roll cage building in automotive restoration and modification projects. Whether you're designing a tube frame, reinforcing undercarriage geometry, or creating custom mounts for engine bay components, this precisely dimensioned tubing serves as the backbone for countless performance and safety-critical applications. Mechanics and fabricators rely on this material for its proven weldability, structural integrity, and predictable behavior under stress.

The 3/4-inch outer diameter with 0.065-inch wall thickness delivers an optimal balance between weight savings and rigidity—critical in both street and competition builds where unsprung mass and chassis flex directly impact handling response. Mild steel composition ensures superior weldability compared to high-carbon alternatives; it accepts MIG, TIG, and stick welding processes without embrittlement or cracking risk, making it ideal for fabricators without exotic equipment. The 12-foot length minimizes waste on typical frame sections and mounting brackets while the 6.8-pound weight per stick keeps total material costs reasonable on larger projects. This tubing meets dimensional tolerances required for precision fitting and cutting, essential when fabricating roll cages, A-arm assemblies, or custom suspension links.

Frame builders, fabrication shops, and serious DIY mechanics benefit most from stocking this tubing for both one-off custom builds and prototype development. Applications range from mild street rod construction to dedicated race car chassis, transmission crossmembers, and engine bay bracing. The square profile provides superior torsional rigidity and cleaner attachment points compared to round tube, while the thin wall keeps structural weight minimal—especially important in weight-sensitive platforms. Verify your welding process compatibility and local regulations before integration into roll cages or structural safety components; consult your build specifications for load calculations and tube orientation requirements.