Diameter versus wall
Bending stiffness rises steeply with diameter. A slightly larger OD with a thinner wall usually gives a stiffer, lighter pole than a smaller, thicker tube.
Outdoor equipment materials
Aluminium Tent Pole Tube: Alloys, Sizes & Design
Aluminium tent poles are made from thin-wall drawn tube in high-strength 7xxx alloys, chiefly 7001 and 7075, with 6061 for heavier and lower-cost poles. Each section is a main tube with a short insert tube bonded into one end so the sections plug together. This guide covers alloy and temper choice, standard main and insert sizes, finishing and how aluminium compares with fibreglass and carbon. Metline supplies tent pole tube and insert tube, cut to length and anodised, to pole and tent makers worldwide.
- Alloys
- 7001 · 7075 · 6061
- Tempers
- T6, T9
- Common OD
- 8.5 – 19 mm
- Typical wall
- 0.5 – 1.0 mm
Why tent poles are made from aluminium
A dome or tunnel tent is held up by poles bent into arches. Each pole must flex into a curve during pitching, carry wind and snow loads without kinking, and spring back straight when the tent is struck. That combination of high strength, enough elasticity and low weight is exactly what thin-wall 7xxx aluminium tube provides.
Aluminium poles are stronger and more durable than fibreglass at a similar or lower weight, and they bend rather than splinter when overloaded, so a damaged pole can usually be splinted or one section replaced in the field. Carbon fibre is lighter still but costs more and fails suddenly when nicked. For backpacking, mountaineering and four-season tents, aluminium remains the mainstream choice; fibreglass dominates low-cost family tents.
A pole is assembled from sections typically 30 – 50 cm long, joined by insert tubes and threaded on an elastic shock cord. The tube must therefore be precise: the insert must fit the main tube bore snugly, every section of a pole must have the same stiffness, and the ends must be finished so they do not cut the shock cord or the tent sleeve.
7001, 7075 and 6061 compared
| Alloy | Character | Typical use |
|---|---|---|
| 7001-T6 | The highest-strength common tent pole alloy; zinc, magnesium and copper are all higher than in 7075 | Ultralight backpacking and premium three- and four-season tents |
| 7075-T6 / T9 | Very high strength, widely available and well documented; T9 adds cold work after ageing for extra strength | Mainstream quality tents, trekking and awning poles |
| 6061-T6 | Moderate strength, excellent corrosion resistance, low cost, easy to machine | Heavier family tents, canopy and awning poles, telescoping tarp poles |
| 7005 / 7003 | Extrudable, weldable 7xxx grades with good strength | Larger-diameter frame and awning poles |
Typical properties for 7075-T6 tube are about 572 MPa tensile and 503 MPa yield, roughly twice those of 6061-T6 (about 310 / 276 MPa). 7001-T6 is stronger again. In practice, the higher yield strength lets a 7xxx pole bend into a tighter arch without permanent set, or use a thinner wall for the same arch, which is where the weight saving comes from. Mill certificates for each lot give the actual tensile results.
The T9 temper means solution heat-treated, artificially aged and then cold worked. On drawn tent pole tube the final drawing pass after ageing raises strength above T6. Proprietary pole alloys sold under brand names are generally variants of the 7xxx family; specify a registered alloy and temper on your drawings.
Composition limits (wt %)
| Element | 7001 | 7075 | 6061 |
|---|---|---|---|
| Zinc (Zn) | 6.8 – 8.0 | 5.1 – 6.1 | ≤ 0.25 |
| Magnesium (Mg) | 2.6 – 3.4 | 2.1 – 2.9 | 0.8 – 1.2 |
| Copper (Cu) | 1.6 – 2.6 | 1.2 – 2.0 | 0.15 – 0.40 |
| Chromium (Cr) | 0.18 – 0.35 | 0.18 – 0.28 | 0.04 – 0.35 |
| Silicon (Si) | ≤ 0.35 | ≤ 0.40 | 0.40 – 0.80 |
| Iron (Fe) | ≤ 0.40 | ≤ 0.50 | ≤ 0.70 |
| Manganese (Mn) | ≤ 0.20 | ≤ 0.30 | ≤ 0.15 |
| Titanium (Ti) | ≤ 0.20 | ≤ 0.20 | ≤ 0.15 |
| Aluminium | Remainder | Remainder | Remainder |
Limits as registered with the Aluminum Association. The higher alloy content of 7001 gives more strength but makes it harder to process, which is why it costs more than 7075.
Common main tube and insert tube sizes
The table pairs widely used main tube sizes with the insert tube that fits each bore. The insert is a few thousandths of an inch smaller than the main tube ID, so it can be bonded or crimped into one end with a projecting length (often about 35 – 40 mm) that plugs into the next section. Masses are calculated from geometry at 2.80 g/cm³ for 7xxx alloys.
| Main tube OD | Wall | Main tube ID | Matching insert OD | Main tube mass (g/m) |
|---|---|---|---|---|
| 0.340 in (8.64 mm) | 0.025 in (0.64 mm) | 0.290 in (7.37 mm) | 0.287 in (7.29 mm) | 45 |
| 0.344 in (8.74 mm) | 0.019 in (0.48 mm) | 0.306 in (7.77 mm) | 0.303 in (7.70 mm) | 35 |
| 0.355 in (9.02 mm) | 0.025 in (0.64 mm) | 0.305 in (7.75 mm) | 0.302 in (7.67 mm) | 47 |
| 0.380 in (9.65 mm) | 0.026 in (0.66 mm) | 0.328 in (8.33 mm) | 0.325 in (8.26 mm) | 52 |
| 0.433 in (11.00 mm) | 0.030 in (0.76 mm) | 0.373 in (9.47 mm) | 0.370 in (9.40 mm) | 69 |
| 0.625 in (15.88 mm) | 0.038 in (0.97 mm) | 0.549 in (13.94 mm) | 0.544 in (13.82 mm) | 127 |
| 0.742 in (18.85 mm) | 0.032 in (0.81 mm) | 0.678 in (17.22 mm) | 0.675 in (17.15 mm) | 129 |
An 8.5 mm (0.340 in) pole is typical of lightweight backpacking tents, 9.5 – 11 mm of three-season family and expedition tents, and 12.5 – 19 mm of large tents, awnings and canopies. Section lengths are chosen to fit the pack: a 3.6 m pole of 9 sections of about 40 cm packs into a short stuff sack.
Design points for pole makers
Arch radius
The tightest curve a pole sees during pitching sets the bending stress. Check that the outer-fibre stress stays below yield with margin, or the pole takes a permanent bend.
Insert fit
Too tight and inserts are hard to seat; too loose and joints rattle and wear. Specify OD and ID tolerances on both tubes and confirm the fit on samples.
Ferrule and end finish
Chamfered, deburred ends protect the shock cord. Some designs swage the female end to accept the next section without a separate insert.
Pre-bent sections
Pre-bent tube shapes a tent with less stress at peaks. Bending is done on aged tube to a gentle radius, or before final heat treatment.
Galvanic contact
Steel or brass end fittings in salt air can corrode aluminium; use aluminium or plastic tips, or isolate dissimilar metals.
Anodising and colour
- Type II anodising: the standard finish, clear or dyed black, grey, green, blue, gold, red and other colours, typically 8 – 15 µm
- Hard anodising (Type III): thicker, harder film for beach, desert and rental tents where sand and abrasion wear poles quickly
- Colour coding: different colours for each pole of a tent make pitching easier; colour-matched tips and clips are common
- Laser marking: logos and part numbers marked through the anodic film after finishing
Anodise after cutting and end finishing so cut faces are sealed. The film is thin, but on close insert fits allow for it on the insert OD.
Aluminium, fibreglass and carbon tent poles
| Property | Aluminium (7xxx) | Fibreglass | Carbon fibre |
|---|---|---|---|
| Weight for equal strength | Light | Heavier | Lightest |
| Failure mode | Bends, can be splinted | Splinters and cracks | Snaps suddenly if damaged |
| Cold-weather behaviour | Keeps toughness | Becomes more brittle | Good, but notch-sensitive |
| Corrosion | Anodised; slight risk in salt air | None | None |
| Relative cost | Medium | Low | High |
| Typical tents | Backpacking, 3- and 4-season | Budget family tents | Ultralight specialist tents |
Tent and shelter applications
- Backpacking and trekking tents: 8.5 – 9.5 mm 7001 or 7075 poles
- Family and group tents: 9.5 – 12.5 mm poles with heavier walls for wider spans
- Four-season and expedition tents: stiffer 7xxx poles in larger diameters for snow and wind
- Awnings, canopies and tarps: 6061 or 7075 straight and telescoping poles, see telescopic tube
- Military, relief and medical shelters: robust, larger-diameter frame poles
- Replacement sections: pole repairers buy matched main and insert tube to restore broken poles
Metline supplies the aluminium tube, cut to section length with inserts on request and anodised. Shock cord, tips, hubs, clips and final pole assembly are carried out by the pole or tent maker.
How to order tent pole tube
- SpecifyAlloy and temper, main tube OD and wall, insert tube OD and wall, section length, insert projection, and finish colour.
- SampleFor a new design, approve a sample set to confirm insert fit, flex and colour.
- QuoteWe confirm tolerances, certification and delivery terms (EXW, FOB, CIF or DAP).
- ShipSections bundled by size and colour in cartons or crates, with an EN 10204 3.1 mill certificate.
References and standards
- The Aluminum Association – International Alloy Designations and Chemical Composition Limits
- ASTM B210 – Aluminum and Aluminum-Alloy Drawn Seamless Tubes
- ANSI H35.1 – Alloy and Temper Designation Systems for Aluminum
- ASM International – Properties of Wrought Aluminum and Aluminum Alloys
Aluminium (aluminum) tent pole tube: FAQ
Is 7001 or 7075 better for tent poles?
7001 is stronger, so it allows slightly lighter poles or tighter arches, and is used in premium ultralight tents. 7075 is nearly as good, more widely available and less costly, and is used in most quality tents.
What does T9 mean on an aluminium tent pole?
T9 means solution heat-treated, artificially aged and then cold worked. The cold drawing after ageing raises strength above the T6 condition.
What diameter aluminium tent pole do I need?
About 8.5 mm for lightweight backpacking tents, 9.5 – 11 mm for most three-season tents, and 12.5 mm or more for large family tents, awnings and canopies. Match the OD and insert size when replacing a section.
Are aluminium tent poles better than fibreglass?
For strength, weight and durability, yes. Aluminium poles bend rather than splinter and are easier to repair. Fibreglass is cheaper and used in budget tents.
Can I buy replacement tent pole sections from Metline?
We supply main tube and insert tube by size, cut to length and anodised, in production quantities for pole makers and repairers. We do not assemble finished poles.
How long is a folded tent pole section?
Usually 30 – 50 cm. Shorter sections pack smaller but add joints and weight; most backpacking poles use sections of about 40 cm.
Need tent pole tube?
Send the alloy, tube sizes, section length, finish and quantities. We will reply with availability and a delivered price.
