6061 aluminum square tube is a heat-treatable extruded section that delivers a high strength-to-weight ratio with good weldability and corrosion resistance. It is well suited to load-bearing frameworks, machine supports, and architectural railings.
Available forms: square tube / rectangular tube
Common tempers: O / T4 / T6 / T651
Processing support: cut-to-length / CNC / welding prep / anodizing
Quality documents: MTC report with every order
6061 square tube is an extruded hollow section that combines rigidity with light weight. Supplied mainly in T6, it offers the stiffness needed for frameworks, jigs, and racking while remaining easy to cut, weld, and finish.
Square tubes are supplied with outer side dimensions from 10 mm to 300 mm, wall thicknesses of 1 – 20 mm, and lengths of 1000 – 6000 mm.
| Form | Temper | Side (mm) | Wall (mm) | Length (mm) |
|---|---|---|---|---|
| Square tube | O, T4, T6, T651 | 10 – 300 | 1 – 20 | 1000 – 6000 |
| Element | Content (%) |
|---|---|
| Silicon (Si) | 0.40 – 0.80 |
| Iron (Fe) | 0.70 max |
| Copper (Cu) | 0.15 – 0.40 |
| Manganese (Mn) | 0.15 max |
| Magnesium (Mg) | 0.80 – 1.20 |
| Chromium (Cr) | 0.04 – 0.35 |
| Zinc (Zn) | 0.25 max |
| Titanium (Ti) | 0.15 max |
| Others (each) | 0.05 max |
| Others (total) | 0.15 max |
| Aluminum (Al) | Remainder |
The values below are typical room-temperature properties for 6061 and are representative of extruded, drawn, or rolled product. Exact numbers vary with section size and product form; final inspection is reported on the MTC.
| Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Brinell Hardness (HB) |
|---|---|---|---|---|
| O | 124 | 55 | 25 | 30 |
| T4 | 241 | 145 | 22 | 65 |
| T6 | 310 | 276 | 12 | 95 |
| T651 | 310 | 276 | 12 | 95 |
The hollow section gives high stiffness per unit weight, ideal for transport and handling structures.
6061 tubes weld readily, supporting on-site fabrication of frames and supports.
Good general resistance; anodizing or coating extends service life outdoors.
Linsy Aluminum is a Shenzhen-based supplier with more than 20 years of experience in distributing and processing aluminum alloys from the 1000 to 8000 series. We support buyers with cut-to-length, CNC machining, welding preparation, surface finishing, and documented quality control.
Orders are handled against agreed lead times, and each lot is shipped with the corresponding MTC. Our team works with procurement, engineering, and fabrication customers to match the right temper and form to the application.
Typical stock covers 1 – 20 mm wall across side dimensions from 10 mm to 300 mm; other sizes can be quoted.
In T6 it provides good load capacity at low weight and is widely used for frameworks, guards, and supports.
Yes. Proper surface preparation gives a durable coated finish for indoor and outdoor use.
Standard stock sizes are usually dispatched within 10 – 60 days depending on temper, form, and finishing. Custom-cut or specially heat-treated material is confirmed at quotation.
Yes. An MTC is supplied with every order, and third-party test reports (for example SGS) can be arranged on request.
We can work to ASTM, EN, GB/T, JIS, and customer-specific drawings. Please share the required standard when requesting a quote.
Yes. Cutting-to-length, CNC machining, and basic fabrication are available; discuss your requirements when ordering.
Linsy Advantages
Linsy Aluminum is a leading supplier of aluminum processing products, serving diverse industries including aerospace, general engineering, automotive, marine, shipbuilding and other specialized industrial applications.
We are committed to maintaining the highest standards of quality and environmental responsibility, as demonstrated by our certifications: ISO 9001:2008， ISO 14001:2004 and SGS.
