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Aluminum Square Tube Sizes & Weights
Extruded aluminum square tube from 20 × 20 to 50 × 50 mm, in 6063-T5 for frames, furniture and railings or 6061-T6 for structural use. Weights and section properties are calculated from nominal dimensions.
Size chart
Square Tubes: sizes and section properties
Weights at 2.70 g/cm³; Ix and Iy about the centroidal axes. Alloy 6063-T5 (6061-T6 on request). Mill, anodized or powder coated.
| Code | Size | Area (mm²) | Weight (kg/m) | Ix (cm⁴) | Iy (cm⁴) |
|---|---|---|---|---|---|
| CM-SQ-2020-1-5 | 20 × 20 × 1.5 mm | 110.5 | 0.298 | 0.63 | 0.63 |
| CM-SQ-2525-2 | 25 × 25 × 2 mm | 183.4 | 0.495 | 1.62 | 1.62 |
| CM-SQ-3030-2 | 30 × 30 × 2 mm | 223.4 | 0.603 | 2.93 | 2.93 |
| CM-SQ-4040-2 | 40 × 40 × 2 mm | 303.4 | 0.819 | 7.31 | 7.31 |
| CM-SQ-5050-3 | 50 × 50 × 3 mm | 563.4 | 1.521 | 20.81 | 20.81 |
Aluminum Square Tube 20 × 20 × 1.5 mm
- Size
- 20 × 20 × 1.5 mm
- Weight
- 0.298 kg/m
- Alloy
- 6063-T5
Aluminum Square Tube 25 × 25 × 2 mm
- Size
- 25 × 25 × 2 mm
- Weight
- 0.495 kg/m
- Alloy
- 6063-T5
Aluminum Square Tube 30 × 30 × 2 mm
- Size
- 30 × 30 × 2 mm
- Weight
- 0.603 kg/m
- Alloy
- 6063-T5
Aluminum Square Tube 40 × 40 × 2 mm
- Size
- 40 × 40 × 2 mm
- Weight
- 0.819 kg/m
- Alloy
- 6063-T5
Aluminum Square Tube 50 × 50 × 3 mm
- Size
- 50 × 50 × 3 mm
- Weight
- 1.521 kg/m
- Alloy
- 6063-T5
Applications
Where square tubes are used
Square tube offers equal stiffness about both axes, making it the default for frames and posts. Other sizes and walls are available on request.
- Frames and racks
- Furniture and shopfitting
- Railings and balustrades
- Trailer and vehicle structures
Questions
How do you calculate the weight of aluminum square tube?
Area = B² − (B − 2t)², in mm²; weight in kg/m = area × 0.0027. A 40 × 40 × 2 mm tube has an area of 304 mm² and weighs about 0.82 kg/m.
Which alloy is best for square tube?
6063-T5 for appearance and general use; 6061-T6 where the tube carries significant load.
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