Square Mild Steel Tubing 3/4in x .049in x 12ft

Square mild steel tubing 3/4in x .049in x 12ft from ALLSTAR PERFORMANCE is the backbone of custom automotive fabrication, whether you're building a roll cage, chassis components, or structural reinforcements for your project vehicle. This is the workhorse material mechanics and fabricators reach for when precision geometry and strength matter—no compromises. Available as a full 12-foot length, it gives you maximum stock efficiency for cutting custom sections without excessive waste, making it ideal for both single-car builds and shop inventory.

The 3/4-inch square profile delivers excellent strength-to-weight balance critical in suspension geometry, frame repairs, and tube-frame chassis applications where rigidity is non-negotiable. Wall thickness of 0.049 inches (.049in) is engineered for weldability and structural integrity without excessive mass—a proven specification in both street and competition automotive builds. Mild steel composition allows for easy welding using standard MIG or stick processes, with excellent ductility that prevents brittle failure under suspension loads or impact stress. At just 4.6 pounds per 12-foot length, this tubing won't add dead weight to your build while maintaining the dimensional consistency required for tight tolerances in custom fabrication.

Fabricators, hot rod builders, and street-machine mechanics rely on square mild steel tubing like this for cage work, A-arm construction, and frame reinforcement on everything from vintage muscle cars to modern performance platforms. The straightness and dimensional accuracy of ALLSTAR PERFORMANCE tubing ensures your joints fit tight and your welds sit flush, eliminating the frustration of chasing tolerance stack-up across multiple cuts. Whether you're building a full roll cage, adding subframe connectors, or fabricating custom suspension links, this 12-foot stock gives you the raw material to execute your vision without compromise.