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Ryerson’s stock of aluminum round tubing is offered in alloy 6061, as well as variety of other alloys including 2011, 2024, 3003 and 6063. The 6061 round tubing offers corrosion resistance, weldability and good strength. Our 2011 alloy tubing is the most machinable of our aluminum round tubing, while 3003 round tubing is often used for marine fittings, framing and structural components.