A square tube is a hollow section of hot-rolled, welded mild steel. Square tubing is typically stocked in 6 metre lengths and is available in various diameters and wall thickness sizes. The wall thickness of the tube indicates its strength. Square tube is easy to drill, weld and cut and can be galvanized to prevent corrosion. Commercial quality square tubes are mainly used for non-structural purposes, such as in carports, gates, fences, palisades and also steel frames.
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