Mild Steel Round Tubing 3/8in x .065in x 12ft

Mild Steel Round Tubing 3/8in x .065in x 12ft from ALLSTAR PERFORMANCE is the go-to material for custom fabrication work in automotive builds, roll cages, exhaust systems, and structural reinforcement projects. Whether you're building a race car chassis, adding bracing to a performance frame, or constructing custom headers and intake manifold runners, this mild steel tubing delivers the structural integrity and workability that professional fabricators and enthusiast mechanics demand. The 12-foot length provides ample stock for cutting and welding multiple components without excessive waste.

The 3/8-inch outer diameter with a .065-inch wall thickness strikes an ideal balance between strength and weight, making it suitable for both light-duty reinforcement and moderate load-bearing applications. Mild steel's lower carbon content compared to high-strength alloys means it machines cleanly, welds easily with standard MIG or stick equipment, and accepts bends without brittleness—critical advantages when designing custom intake runners, exhaust collectors, or cage work. At 2.7 lbs per 12-foot section, this tubing keeps your build lightweight while the material's ductility allows for smooth radius bends in mandrel benders without kinking. The consistent wall thickness ensures uniform strength throughout the length and predictable performance under thermal and mechanical stress.

Fabricators restoring vintage muscle cars, builders constructing tube-frame race cars, and mechanics upgrading exhaust systems will find this tubing indispensable for prototyping and production work. Its compatibility with stick, MIG, and TIG welding processes and ability to accept standard fasteners make it ideal for both bolt-together assemblies and fully welded structures. Before cutting, confirm your project requires mild steel rather than chrome-moly for your specific stress loads; while mild steel suits most street performance and custom fabrication tasks, high-performance race applications may demand higher-strength alternatives. Proper cleaning and painting after fabrication prevents surface rust and ensures longevity in underbody or exposed mounting locations.