The Forms We Supply
Four routes cover most of what we quote. Each is a different mill or process route, so the size
window and the lead time differ even where the grade looks similar.
6061 and 6063 tube
The two workhorse alloys: 6061 for structural tube, 6063 where the anodized finish is the visible requirement.
Frames, rails, architectural tube
5083 marine tube
Salt-water-resistant and weldable, for structures and lines that run in a marine environment.
Marine frames, dockside structures
2024 and 7075 tube
High-strength tube for parts where weight and load both matter, supplied in the temper the design calls for.
Aerospace, motorsport, high-load parts
Cut, bent and finished tube
Tube cut to length, bent or drilled before anodizing or powder coating, so the finish covers the finished part.
Handrails, frames, fabricated assemblies
Size Range and Standard
Round tube is quoted by outside diameter, wall and temper. A tube specified only by outside diameter leaves the strength undefined, because the wall carries it.
Swipe the table sideways for the notes →
| Parameter | Range | What decides it |
|---|
| Outside diameter | 8 – 350 mm | Below 20 mm the wall range narrows; above 200 mm the wall range widens. |
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| Wall thickness | 1 – 40 mm | Wall and diameter are quoted as a pair, since not every wall exists at every size. |
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| Alloys | 6061, 6063, 5083, 2024, 7075, 3003 | 6063 for finish, 6061 for structure, 5083 for marine and welding. |
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| Temper | T4, T5, T6, T651 | T6 for structural parts, T5 for architectural tube, O where forming comes first. |
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| Length | Cut to length, typically up to 6 m | Handling and freight, rather than the mill, set the practical maximum. |
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| Finish | Mill, anodized, powder coated, sand blasted | Anodizing is a surface conversion; powder coating adds a film with a colour. |
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Products' Properties and Advantages
Four properties explain why round aluminum tube ends up in frames, facades and fluid lines.
Strength to weight in bending
A circular section puts material at a constant distance from the axis, which is efficient in torsion and predictable in bending.
Corrosion without a coating
The natural oxide layer makes 6061 and 6063 usable outdoors; 5083 extends that to salt water.
Formability
Annealed tube bends and flares without cracking, which is why bending is usually specified before ageing rather than after.
Finish consistency
Round tube takes anodizing evenly around its circumference, so a run of lengths matches in colour across the batch.
How We Help Customers
Tube enquiries usually come down to four decisions. We confirm them in this order because each one constrains the next.
01
Give outside diameter and wall together
The pair defines the section. A tube quoted by outside diameter alone leaves the load capacity undefined.
02
Choose the alloy and temper
6061-T6 for structure, 6063-T5 for finish, 5083 for marine, and O where the tube is bent after delivery.
03
Decide the forming step
Bending, flaring and swaging are done before ageing or after annealing; the sequence changes the temper on the drawing.
04
Fix the finish and the packing
Anodized or powder coated, with protection between lengths so the visible surface arrives unmarked.
Real Applications
Round tube is a structural and a decorative product at once, and the application decides which of the two dominates.
Building frames and structures
Lightweight frames where the strength-to-weight ratio reduces both handling cost and the load on the structure below.
Facades, cladding and canopies
Anodized or powder-coated tube in exterior work, where the finish has to survive weather and cleaning.
Handrails, furniture and interiors
Tube bent and finished as a visible part, with the joint details decided before anodizing.
Fluid, air and structural lines
Process and pneumatic lines where a consistent bore and a known wall carry the requirement.
