6061 aluminum square tube is a versatile structural aluminum product known for its excellent strength, corrosion resistance, and weldability. It is widely used in construction frames, mechanical supports, gates, fences, railings, and other applications where durability and lightweight performance are essential. The tubing is produced through seamless extrusion and is available with either sharp or radius corners to suit different engineering needs.Quick Quote
Chalco supplies 6061 aluminum square tubing in both T6 and T6511 tempers to meet various structural and machining requirements. With a wide selection of sizes in stock, our inventory supports everything from prototyping to large-scale production. Whether you need mill lengths or custom-cut sections, we ensure fast delivery and consistent quality. View available stock sizes
6061 aluminum square tube tempers
6061-T6 aluminum square tube
6061-T6 is one of the most common tempers for aluminum square tubing. It is produced by solution heat treatment followed by artificial aging, resulting in high strength, good corrosion resistance, and excellent weldability. This temper is widely used in structural frameworks, support beams, gates, and railings where mechanical strength is a priority. However, due to residual stress from quenching, it may be more prone to distortion during machining.
6061-T6511 aluminum square tube
6061-T6511 undergoes the same heat treatment as T6 but includes an additional stress-relieving step through stretching and straightening. This makes it more dimensionally stable and less likely to warp during CNC machining or precision fabrication. While the mechanical strength is nearly identical to T6, T6511 offers improved machinability and is the preferred choice for high-precision structural components. It is the standard temper for most extruded aluminum profiles, including square tubing.
Standards and specifications
Chalco's 6061 aluminum square tubes are manufactured in compliance with major international standards to ensure consistent quality, mechanical performance, and compatibility for global applications. Below are the key specifications we follow:
| ASTM | AMS | EN (Mechanical) | EN (Chemical) | ISO |
| ASTM B221 | AMS-QQ-A-200/8 | EN 755-2 | EN 573-3 | ISO 6362 |
Chalco 6061 aluminum square tubing stock purchase guide
- All 6061 aluminum square tubes in stock are available for retail purchase, with no minimum order quantity, providing flexibility for sampling and small-batch needs.
- Orders are cleared and shipped within 7 days after confirmation, helping your project start without delay.
- As a primary manufacturer, Chalco operates large-scale automated extrusion and precision machining, offering products at prices that are over 10% lower than the market average for comparable quality.
- Each product is thoroughly tested for tensile strength, hardness, dimensional tolerance, and surface quality, in full compliance with international standards such as ASTM B221 and AMS-QQ-A-200/8, ensuring peace of mind with every purchase.
- We maintain a wide range of stock sizes in both T6 and T6511 tempers, with support for custom cutting, packaging, and export-ready delivery for global engineering, fabrication, and OEM applications.Email Us for a quick quote.
Chalco 6061 aluminum square tube stock size list
All stocked 6061 aluminum square tubes are produced to strict dimensional tolerances for consistent fit and assembly. View detailed tolerance chart.
6061 t6 square tube stock size
| Products | Thickness (inch) | Width (inch) | Length (inch) |
| 1/16" x 3/4" x 240" 6061 T6 Aluminum Square Tube | 1/16" | 3/4" | 240" |
| 1/16" x 1" x 240" 6061 T6 Aluminum Square Tube | 1/16" | 1" | 240" |
| 1/16" x 1-1/2" x 240" 6061 T6 Aluminum Square Tube | 1/16" | 1-1/2" | 240" |
| .065" x 1-1/4" x 240" 6061 T6 Aluminum Square Tube | .065" | 1-1/4" | 240" |
| .065" x 2" x 240" 6061 T6 Aluminum Square Tube | .065" | 2" | 240" |
| .083" x 1" x 240" 6061 T6 Aluminum Square Tube | .083" | 1" | 240" |
| .083" x 1-1/2" x 240" 6061 T6 Aluminum Square Tube | .083" | 1-1/2" | 240" |
| .095" x 1-1/4" x 240" 6061 T6 Aluminum Square Tube | .095" | 1-1/4" | 240" |
| .095" x 2" x 240" 6061 T6 Aluminum Square Tube | .095" | 2" | 240" |
| 1/8" x 1" x 240" 6061 T6 Aluminum Square Tube | 1/8" | 1" | 240" |
| 1/8" x 1-1/4" x 240" 6061 T6 Aluminum Square Tube | 1/8" | 1-1/4" | 240" |
| 1/8" x 1-1/2" x 240" 6061 T6 Aluminum Square Tube | 1/8" | 1-1/2" | 240" |
| 1/8" x 1-3/4" x 240" 6061 T6 Aluminum Square Tube | 1/8" | 1-3/4" | 240" |
| 1/8" x 2" x 240" 6061 T6 Aluminum Square Tube | 1/8" | 2" | 240" |
| 1/8" x 2-1/2" x 240" 6061 T6 Aluminum Square Tube | 1/8" | 2-1/2" | 240" |
| 1/8" x 3" x 240" 6061 T6 Aluminum Square Tube | 1/8" | 3" | 240" |
| 1/8" x 4" x 240" 6061 T6 Aluminum Square Tube | 1/8" | 4" | 240" |
| 1/8" x 5" x 240" 6061 T6 Aluminum Square Tube | 1/8" | 5" | 240" |
| 1/8" x 6" x 240" 6061 T6 Aluminum Square Tube | 1/8" | 6" | 240" |
| 1/8" x 8" x 240" 6061 T6 Aluminum Square Tube | 1/8" | 8" | 240" |
| 3/16" x 1-1/2" x 240" 6061 T6 Aluminum Square Tube | 3/16" | 1-1/2" | 240" |
| 3/16" x 2" x 240" 6061 T6 Aluminum Square Tube | 3/16" | 2" | 240" |
| 3/16" x 2-1/2" x 240" 6061 T6 Aluminum Square Tube | 3/16" | 2-1/2" | 240" |
| 3/16" x 3" x 240" 6061 T6 Aluminum Square Tube | 3/16" | 3" | 240" |
| 3/16" x 4" x 240" 6061 T6 Aluminum Square Tube | 3/16" | 4" | 240" |
| 3/16" x 5" x 240" 6061 T6 Aluminum Square Tube | 3/16" | 5" | 240" |
| 3/16" x 6" x 240" 6061 T6 Aluminum Square Tube | 3/16" | 6" | 240" |
| 3/16" x 8" x 240" 6061 T6 Aluminum Square Tube | 3/16" | 8" | 240" |
| 3/16" x 10" x 240" 6061 T6 Aluminum Square Tube | 3/16" | 10" | 240" |
| 1/4" x 1-1/2" x 240" 6061 T6 Aluminum Square Tube | 1/4" | 1-1/2" | 240" |
| 1/4" x 2" x 240" 6061 T6 Aluminum Square Tube | 1/4" | 2" | 240" |
| 1/4" x 2-1/2" x 240" 6061 T6 Aluminum Square Tube | 1/4" | 2-1/2" | 240" |
| 1/4" x 3" x 240" 6061 T6 Aluminum Square Tube | 1/4" | 3" | 240" |
| 1/4" x 4" x 240" 6061 T6 Aluminum Square Tube | 1/4" | 4" | 240" |
| 1/4" x 5" x 240" 6061 T6 Aluminum Square Tube | 1/4" | 5" | 240" |
| 1/4" x 6" x 240" 6061 T6 Aluminum Square Tube | 1/4" | 6" | 240" |
| 1/4" x 8" x 240" 6061 T6 Aluminum Square Tube | 1/4" | 8" | 240" |
| 1/4" x 10" x 240" 6061 T6 Aluminum Square Tube | 1/4" | 10" | 240" |
| 5/16" x 4" x 240" 6061 T6 Aluminum Square Tube | 5/16" | 4" | 240" |
| 5/16" x 6" x 240" 6061 T6 Aluminum Square Tube | 5/16" | 6" | 240" |
| 5/16" x 8" x 240" 6061 T6 Aluminum Square Tube | 5/16" | 8" | 240" |
| 5/16" x 10" x 240" 6061 T6 Aluminum Square Tube | 5/16" | 10" | 240" |
| 3/8" x 3" x 240" 6061 T6 Aluminum Square Tube | 3/8" | 3" | 240" |
| 3/8" x 4" x 240" 6061 T6 Aluminum Square Tube | 3/8" | 4" | 240" |
| 3/8" x 6" x 240" 6061 T6 Aluminum Square Tube | 3/8" | 6" | 240" |
| 3/8" x 8" x 240" 6061 T6 Aluminum Square Tube | 3/8" | 8" | 240" |
| 3/8" x 10" x 240" 6061 T6 Aluminum Square Tube | 3/8" | 10" | 240" |
| 1/2" x 4" x 240" 6061 T6 Aluminum Square Tube | 1/2" | 4" | 240" |
| 1/2" x 6" x 240" 6061 T6 Aluminum Square Tube | 1/2" | 6" | 240" |
| 1/2" x 8" x 240" 6061 T6 Aluminum Square Tube | 1/2" | 8" | 240" |
| 1/2" x 10" x 240" 6061 T6 Aluminum Square Tube | 1/2" | 10" | 240" |
| 5/8" x 4" x 240" 6061 T6 Aluminum Square Tube | 5/8" | 4" | 240" |
| 5/8" x 6" x 240" 6061 T6 Aluminum Square Tube | 5/8" | 6" | 240" |
| 5/8" x 8" x 240" 6061 T6 Aluminum Square Tube | 5/8" | 8" | 240" |
| 3/4" x 4" x 240" 6061 T6 Aluminum Square Tube | 3/4" | 4" | 240" |
| 3/4" x 6" x 240" 6061 T6 Aluminum Square Tube | 3/4" | 6" | 240" |
| 3/4" x 8" x 240" 6061 T6 Aluminum Square Tube | 3/4" | 8" | 240" |
6061 t6511 square tube stock size
| Products | Thickness (inch) | Width (inch) | Length (inch) |
| 1/8" x 3/4" x 240" Aluminum Square Tube 6061 T6511 | 1/8" | 3/4" | 240" |
| 1/8" x 1-1/4" x 240" Aluminum Square Tube 6061 T6511 | 1/8" | 1-1/4" | 240" |
| 1/8" x 1-1/2" x 240" Aluminum Square Tube 6061 T6511 | 1/8" | 1-1/2" | 240" |
| 3/16" x 1-1/2" x 240" Aluminum Square Tube 6061 T6511 | 3/16" | 1-1/2" | 240" |
| 1/4" x 1-1/2" x 240" Aluminum Square Tube 6061 T6511 | 1/4" | 1-1/2" | 240" |
| 1/8" x 1-3/4" x 240" Aluminum Square Tube 6061 T6511 | 1/8" | 1-3/4" | 240" |
| 1/8" x 2" x 240" Aluminum Square Tube 6061 T6511 | 1/8" | 2" | 240" |
| 3/16" x 2" x 240" Aluminum Square Tube 6061 T6511 | 3/16" | 2" | 240" |
| 1/4" x 2" x 240" Aluminum Square Tube 6061 T6511 | 1/4" | 2" | 240" |
| 1/8" x 2-1/2" x 240" Aluminum Square Tube 6061 T6511 | 1/8" | 2-1/2" | 240" |
| 3/16" x 2-1/2" x 240" Aluminum Square Tube 6061 T6511 | 3/16" | 2-1/2" | 240" |
| 1/4" x 2-1/2" x 240" Aluminum Square Tube 6061 T6511 | 1/4" | 2-1/2" | 240" |
| 1/8" x 3" x 240" Aluminum Square Tube 6061 T6511 | 1/8" | 3" | 240" |
| 3/16" x 3" x 240" Aluminum Square Tube 6061 T6511 | 3/16" | 3" | 240" |
| 1/4" x 3" x 240" Aluminum Square Tube 6061 T6511 | 1/4" | 3" | 240" |
| 3/8" x 3" x 240" Aluminum Square Tube 6061 T6511 | 3/8" | 3" | 240" |
| 1/8" x 4" x 240" Aluminum Square Tube 6061 T6511 | 1/8" | 4" | 240" |
| 1/4" x 4" x 240" Aluminum Square Tube 6061 T6511 | 1/4" | 4" | 240" |
| 1/2" x 4" x 240" Aluminum Square Tube 6061 T6511 | 1/2" | 4" | 240" |
| 1/4" x 5" x 240" Aluminum Square Tube 6061 T6511 | 1/4" | 5" | 240" |
| 1/4" x 6" x 240" Aluminum Square Tube 6061 T6511 | 1/4" | 6" | 240" |
| 1/2" x 6" x 240" Aluminum Square Tube 6061 T6511 | 1/2" | 6" | 240" |
| 1/4" x 8" x 240" Aluminum Square Tube 6061 T6511 | 1/4" | 8" | 240" |
| 1/2" x 8" x 240" Aluminum Square Tube 6061 T6511 | 1/2" | 8" | 240" |
Product types of 6061 aluminum square tubing
Small aluminum square tube 6061
Wall Thickness & Small Cross Section, Compact size, lightweight yet strong, easy to cut and join, ideal for precision assemblies and space-limited designs
Application: Cabinet reinforcements, shelf supports, display frame edges, portable equipment frames
Thin wall aluminum square tubing 6061
Wall ≤ 2 mm, lightweight, easy to bend & drill, cost-effective for weight-sensitive builds. Learn more about thin wall aluminum tubing
Application:Display racks, portable stands, lightweight equipment frames, signboard structures
Perforated aluminum square tubing 6061
Perforated wall design, lightweight, allows airflow and drainage, easy to cut and weld. Learn more types about perforated aluminum tubing
Application: Vent panels, machine guards, decorative frames
Telescopic aluminium square tube 6061
Adjustable length design, lightweight yet strong, smooth sliding fit, easy to lock and assemble. Learn more about telescopic aluminium square tube
Application: Adjustable stands, portable frames, camera rigs, extendable structures
6061 square tubing with flange
Made from high-strength 6061 aluminum alloy, the integrated flange adds mounting surface and rigidity, giving frames, racks, booths, or kiosks a clean look. Compatible with T-slot profiles.
Application: Framing systems, mechanical supports, mounting brackets, reinforced joints
Slotted aluminum square tubing 6061
Pre-cut slot design for easy assembly, cable routing, and position adjustment.
Application: Modular frames, shelving systems, display structures
Aluminum square tube connectors
Chalco also offers 6061 aluminum square tube connectors, making it easier to assemble strong, precise, and versatile frame structures for a wide range of applications.
1 way aluminum square tube connector with plate
2 way aluminum square tube connector
3 way aluminum square tube connector
4 way aluminum square tube connector
5 way aluminum square tube connector
Cross aluminum square tube connector
Applications of 6061 aluminum square tube
Aerospace
Used for manufacturing aircraft components, spacecraft structures, and aerospace components.
Construction and structural engineering
With high strength, low weight, and excellent corrosion resistance, 6061 aluminum square tube is ideal for load-bearing and aesthetic applications. Common uses include structural frames, fences, handrails, columns, building facade supports, as well as frames for trade show booths and retail kiosks.Send Email
Industrial and mechanical manufacturing
In manufacturing, 6061 aluminum square tube is used for structural components, fixtures, machined parts, jigs, conveyor frames, and industrial guards. Its excellent weldability and machinability make it suitable for CNC machining, drilling, cutting, and other fabrication processes.
Automotive and transportation
Due to its high strength-to-weight ratio, 6061 aluminum square tube is used in automotive and transport manufacturing for valves, couplings, brake components, pistons, vehicle frames, and cargo rack systems. It helps reduce overall vehicle weight and improve fuel efficiency.
Marine and offshore equipment
6061 aluminum square tube offers superior resistance to seawater corrosion, making it suitable for marine hardware, deck structures, boat rails, and ladders in marine environments.
Consumer and recreational products
In the consumer and leisure sector, 6061 aluminum square tube is commonly found in bicycle frames, camping gear, sports equipment supports, and camera rigs, offering a balance of light weight and durability.
Decorative and hardware fittings
With excellent surface finishing properties, 6061 aluminum square tube can be anodized or powder coated for decorative hardware, display racks, signboard frames, and various indoor and outdoor decorative structures.
Recommended related products for 6061 aluminum square tubing
Surface finishing & machining services
Chalco provides both standard and customized finishing and fabrication services for 6061 aluminum square tubing, ensuring each piece meets the specific requirements of appearance, corrosion resistance, and structural performance across various industries.
Surface treatment options
We offer a variety of finishes to improve durability and aesthetics. Anodized aluminum square tubing 6061 is available in clear, black, gold, and other colors, providing excellent corrosion resistance and a refined surface appearance. Learn more about anodized aluminum tubing.
For applications needing a tough, weatherproof coating, powder coated aluminum square tubing 6061 comes in matte or glossy finishes with a wide range of color options, ideal for outdoor and high-humidity environments.
Black Aluminum Square tubing 6061
White Aluminum Square tubing 6061
Gold Aluminum Square tubing 6061
Other finishes include electrophoretic coating for enhanced marine-grade protection and brushed mill finish for a clean, natural aluminum look in decorative or light structural projects.
Machining capabilities
We provide precision cut-to-length processing with tolerances up to ±0.2 mm, ensuring components are ready for assembly without additional modification.
CNC milling enables the production of complex slots, hole patterns, and custom shapes with high accuracy, while punching, drilling, chamfering, and polishing are available to meet specific installation requirements.
For welded structures, we also offer beveling and V-groove preparation, improving joint accuracy and weld strength for long-term performance.
6061-T6 aluminum square tube dimensional tolerances
Chalco's 6061-T6 aluminum square tubes are produced to strict industry tolerance standards, ensuring accurate width, depth, and corner dimensions. Precision manufacturing guarantees a consistent fit for machining, welding, and assembly. If you require special tolerances, we can work with you to provide customized solutions that meet your project needs.
| Specified width or depth (in.) | Deviation at corners (± in.) | Deviation not at corners (± in.) |
| 0.500 – 0.749 | 0.012 | 0.020 |
| 0.750 – 0.999 | 0.014 | 0.020 |
| 1.000 – 1.999 | 0.018 | 0.025 |
| 2.000 – 3.999 | 0.025 | 0.035 |
| 4.000 – 4.999 | 0.035 | 0.045 |
| 5.000 – 5.999 | 0.045 | 0.055 |
| 6.000 – 6.999 | 0.055 | 0.065 |
| 7.000 – 7.999 | 0.065 | 0.075 |
| 8.000 – 8.999 | 0.075 | 0.085 |
| 9.000 – 9.999 | 0.085 | 0.095 |
| 10.000 – 10.999 | 0.095 | 0.105 |
| 11.000 – 12.000 | 0.105 | 0.115 |
The manufacturing method for 6061 T6 aluminum square tubing
Extrusion
This is a common manufacturing method, involving the heated 6061 aluminum alloy billet being extruded into a die with a square cross-sectional shape using high pressure. The raw material is shaped into the form of a square tube and then cut and trimmed to the desired dimensions after cooling.
Welding
This method uses 6061 aluminum sheets or coils, which are joined together using various welding techniques to form square tubing. Common welding methods include TIG (Tungsten Inert Gas), MIG (Metal Inert Gas), and electron beam welding. After welding, the tubing requires trimming and quality inspection.
Casting
The casting method is suitable for manufacturing square tubing with larger sizes and special requirements. In this method, aluminum alloy is melted and then poured into a square mold. After cooling, it takes on the structure of square tubing.
Drawing
This method involves stretching a 6061 aluminum alloy billet through a square die to gradually form the cross-section of the square tubing. It is typically used for manufacturing smaller-sized square tubing, achieving the desired dimensions and shape through multiple extrusion passes.
Mechanical properties of 6061 aluminum square tubing
| Temper | Wall thickness (in.) | Tensile strength (ksi, min) | Yield strength 0.2% offset (ksi, min) | Elongation (%) |
| T6, T6511 | ≤ 0.249 | 38.0 | 35.0 | 8 |
| ≥ 0.250 | 38.0 | 35.0 | 10 |
Characteristics of 6061 T6 aluminum square tubing
High strength: 6061 aluminum alloy exhibits excellent strength, particularly when in the heat-treated (T6) condition.
Excellent corrosion resistance: it has good corrosion resistance, especially exhibiting good tolerance to most atmospheric conditions and common chemical media.
Machinability: easily cut, shaped, and welded, suitable for various machining processes, providing manufacturing flexibility.
Good heat treatment properties: strength can be improved through heat treatment while maintaining high toughness.
Versatility: suitable for various applications, including aerospace, automotive manufacturing, construction, electronics, sports equipment, and more.
Weldability: exhibits good welding characteristics, suitable for various types of welding methods, such as TIG welding, MIG welding, and arc welding.
Considerations when purchasing 6061 aluminum square tubing
Specifications and dimensions: determine the specifications and dimensions you need for 6061 aluminum square tubing, including length, width, thickness, and more. This depends on your specific application requirements.
Alloy type: 6061 aluminum alloy comes in different hardness and performance grades. Choose the appropriate alloy type to meet your application needs.
Quality certification: ensure that the purchased aluminum square tubing complies with relevant quality certifications and standards. This can guarantee the product's quality and performance.
Supplier reputation: choose reputable suppliers or manufacturers who typically offer higher-quality products and better customer support.
Price comparison: obtain quotes from multiple suppliers and compare prices and delivery terms to ensure you get the most competitive deal.
Delivery time: ensure that the supplier can provide the needed aluminum square tubing according to your schedule, especially for urgent projects.
Packaging and shipping: ensure that the aluminum square tubing is properly packaged and protected during transport to prevent damage or corrosion.
6061 aluminum square tubing FAQ
Can 6061 aluminum square tubing be bent?
Yes. 6061 aluminum square tubing can be bent using proper tooling and techniques. When bending square aluminum tubing, especially in the T6 temper, it is recommended to use larger bend radii or consider annealing to reduce the risk of cracking. For projects requiring complex shapes, we offer professional bending services to ensure precision and structural integrity.
How do you connect square aluminum tubing?
6061 aluminum square tubing can be connected using corner brackets, T-connectors, internal splice inserts, or by welding. For modular frames, mechanical connectors with bolts or rivets are preferred for easy assembly and disassembly.
Can I connect square aluminum tubing without welding?
Yes. You can use pre-drilled brackets, slotted connectors, or clamp-style fittings to connect square aluminum tubing without welding, making it ideal for display racks, shelving systems, and portable stands.
Where can I buy aluminium square tube in 6061 alloy?
Chalco offers a wide range of 6061 aluminium square tubes in various sizes, wall thicknesses, and finishes. Both standard lengths and custom cut-to-length services are available to meet your project needs.
Is cheap aluminum square tubing suitable for structural use?
Economical aluminum square tubing may be suitable for decorative or light-duty projects. However, for structural applications, we recommend high-quality alloys like 6061-T6 to ensure strength, durability, and corrosion resistance.
What is the cost of aluminum square tubing in 6061 alloy?
The cost depends on size, wall thickness, length, and surface finish. Chalco offers competitive pricing, with discounts for bulk orders.
Do you offer free samples?
Yes, we provide free samples of 6061 aluminum square tubing so you can evaluate quality and fit before placing an order.
Is there a minimum order quantity?
No. Chalco has no minimum order quantity (MOQ), allowing you to purchase exactly the amount you need for your project.
Can you save tooling costs for custom sizes?
Yes. We have over a thousand existing extrusion dies for 6061 aluminum square tubing, which can significantly reduce or eliminate tooling costs for many custom sizes.
Are You Looking for an Aluminum Supplier?
If you need a professional aluminum supplier to provide you with high-quality, cost-effective aluminum, we will be your best choice.