Aluminium flat bar 40 × 20 mm
It weighs 2.2 kg per metre: a 6 m length weighs 13.2 kg. Here you have the drawing, the dimensions and the weight for different numbers of lengths.
- Code
- 5145
- Type
- Flat bar
- Dimensions (mm)
- A40C20
- Weight per metre
- 2.2 kg/m
- 6 m length
- 13.2 kg
- Metres per kilo
- 0.45 m
- Equivalent cross-section
- 815.1 mm²
- How it is measured
- A is the width; C is the thickness. CR: rounded edge. It is a different profile, not the same size.
How much do the lengths weigh?
| 6 m lengths | 1 | 5 | 10 | 25 | 50 | 100 |
|---|---|---|---|---|---|---|
| Weight | 13.2 kg | 66 kg | 132 kg | 330 kg | 660 kg | 1,320 kg |
| Metres | 6 m | 30 m | 60 m | 150 m | 300 m | 600 m |
How much load does the 40 × 20 flat bar take?
Supported at both ends, with the load at midspan: how many kilos it takes before it bends more than 1/200 of the span (what windows and light structures usually accept) or goes past the elastic limit of 6063-T5 aluminium.
| Span | 0.5 m | 1 m | 1.5 m | 2 m |
|---|---|---|---|---|
| Upright (40 mm high) | 565 kg* | 180 kg | 80 kg | 45 kg |
| Flat (20 mm high) | 180 kg | 45 kg | 20 kg | 11 kg |
Moment of inertia 10.67 cm⁴ upright · 2.67 cm⁴ flat; section modulus 5.33 cm³ upright · 2.67 cm³ flat. * Here the strength of the material governs, not the deflection. A guidance calculation for a straight beam with sharp corners, E = 69 GPa, without its own weight or buckling of thin walls: for a structure, the check must be done by an engineer.
Need this profile?
Ask about availability, alloy, temper and finish, work out the kilos for your order or how many lengths you need for your cuts.
Other sizes of flat bars
Data from the Perfiles de Aluminio standard profile catalogue, 2026 edition, published with its permission. The weight per metre is the one declared by the manufacturer; the actual weight may vary within the tolerances of the standard. The equivalent cross-section is calculated with a density of 2.699 g/cm³. Standard length: 6 m.