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Metal weight

Square tube 300×300×8 mm weight

Steel Square tube 300×300×8, cold-formed (EN 10219), weighs 71.63 kg/m. A 6 m bar weighs 429.8 kg and a 12 m bar 859.5 kg. The hot-finished version (EN 10210) has tighter corners and weighs 72.81 kg/m. Values are theoretical, for a density of 7.85 g/cm³.

Weight per metre71.63kg/m
6 m bar429.8kg
12 m bar859.5kg
Metres per tonne14.0m
Painting surface1.166m²/m
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300 × 300 × 8 mm
Side
300 mm
Wall thickness
8 mm
Cold-formed, EN 10219
71.63 kg/m
Hot-finished, EN 10210
72.81 kg/m
Section area
91.24 cm²
Outer surface
1.166 m²/m
Outer surface
1.166 m²/m

Weight by length

LengthSteelStainless 304Aluminium
1 m71.63 kg72.36 kg24.64 kg
2 m143.25 kg144.71 kg49.27 kg
3 m214.88 kg217.07 kg73.91 kg
4 m286.50 kg289.42 kg98.54 kg
5 m358.13 kg361.78 kg123.18 kg
6 m429.75 kg434.13 kg147.81 kg
8 m573.00 kg578.84 kg197.08 kg
10 m716.25 kg723.55 kg246.35 kg
12 m859.50 kg868.26 kg295.63 kg

How it was calculated

The weight is the section area multiplied by the material density:

kg/m = section area (mm²) × 0.00785. The area comes from side and thickness, minus the rounded corners: for cold-formed tube (EN 10219) the outer radius is 2t up to 6 mm wall, 2.5t up to 10 mm and 3t above; for hot-finished tube (EN 10210) the outer radius is 1.5t.

For Square tube 300×300×8, the section area is 91.24 cm², so 1 metre = 91.24 × 0.785 = 71.625 kg.

The real weight can differ by a few percent because of rolling tolerances. For other materials or lengths use the calculator.

Other square tube sizes

Square tube 300×300×5Square tube 300×300×6Square tube 300×300×8Square tube 300×300×10Square tube 300×300×12.5Square tube 60×60×8Square tube 70×70×8Square tube 80×80×8Square tube 90×90×8Square tube 100×100×8Square tube 120×120×8Square tube 140×140×8Square tube 150×150×8Square tube 160×160×8Square tube 180×180×8Square tube 200×200×8Square tube 250×250×8Full table →

Working out a whole order?

Add Square tube 300×300×8 to the materials list and see the total weight and cost of the order, together with the other products.

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Frequently asked questions

How much does one metre of Square tube 300×300×8 weigh?

One metre of steel Square tube 300×300×8 weighs 71.63 kg.

How much does a 6 m bar of Square tube 300×300×8 weigh?

A 6 m bar weighs 429.8 kg and a 12 m bar 859.5 kg.

How many metres of Square tube 300×300×8 are in one tonne?

One tonne contains about 14.0 metres.