Steel Tube Weight Calculator
Steel tube weight is the outside section area minus the hollow inside area, multiplied by length and steel density.
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Round tube area
A = pi * (OD^2 - ID^2) / 4
Wall thickness
ID = OD - 2 * wall
Worked example
A 50 mm OD by 5 mm wall steel tube has ID = 40 mm and area = 706.9 mm2, so it weighs about 5.55 kg/m.
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