Aluminum Tubes

Choose an alloy based on strength, corrosion resistance, and machinability: 6061 and 6063 are common for general structural and fabrication work, 6061-T6 offers higher strength, and 3003 is used where formability and corrosion resistance are needed; temper (like T6, T4) indicates heat treatment and affects strength and ductility

Verify outer diameter, inner diameter or wall thickness, length, and any required concentricity or roundness tolerances; for structural or press-fit applications, confirm standard tolerance classes (e.g., ±0.005–0.020 in) or specify tighter tolerances if needed

Most common alloys (like 6061) are weldable with proper filler and heat control, are formable/bendable within limits depending on wall thickness and temper, and machine well with carbide tooling; check the specific alloy and temper for compatibility with your process

Store tubes off the ground on supports to prevent bending, keep them dry and clean to minimize surface oxidation, avoid contact with dissimilar metals without isolation to prevent galvanic corrosion, and remove burrs and sharp edges after cutting to protect finishes and safety

Wall thickness and alloy determine weight and load capacity—thicker walls and higher-strength tempers increase weight and cost—so select the minimum wall and appropriate alloy that meet load, buckling, and deflection requirements to balance performance and price

Common finishes include mill finish, anodized, and painted/coated; mill finish may require polishing or coating for aesthetics or corrosion resistance, while anodizing improves wear and corrosion resistance but may add cost and change dimensions slightly

Cutting methods include saws and abrasive cutting with appropriate coolant; deburr and square ends for fittings, use mechanical fasteners, adhesives, or welding for joins depending on alloy and application, and consider inserts or swaging for threaded connections to avoid stripping thin walls