Product Description
Aluminum Square Tube is extruded hollow rectangular profile. It combines light weight, high rigidity, corrosion resistance and easy fabrication, widely used for frames and structural projects.
Main Features
1. Light weight with high structural rigidity
Much lighter than steel while maintaining good bending resistance, effectively reducing overall equipment weight.
2. Excellent corrosion resistance
Natural oxide layer prevents rust. It performs well outdoors, near the sea and in humid environments without painting.
3. Easy processing
Supports cutting, drilling, welding, bending and CNC machining. Clean cutting surface with little post-treatment work.
4. Perfect anodizing effect
Uniform surface for oxidation, powder coating and painting, stable color and beautiful appearance.
Common Alloys & Tempers
• 6061-T6: High strength for load-bearing structures
• 6063-T5: Smooth surface for architectural frames and decoration
• 5052: Marine grade with superior salt spray resistance
Executive standard: EN 755, ASTM B221
We can supply EN 10204 3.1 material certificates.
Applications
Mechanical equipment frames, automation racks, guardrails, building Curtain Walls, vehicle brackets, pipeline supports, cabinet frames and outdoor engineering structures.
Aluminum Square Tube Supplier for Industrial Frames, Structures, and Custom Fabrication
At Shandong Hanglv International Trade Co., Ltd., we supply Aluminum Square Tube products for customers who need lightweight structural materials, stable dimensions, clean surfaces, and flexible processing options. Our company is based in Shandong Province, China, where aluminum manufacturing resources and logistics networks are well developed.
We work with customers in construction, industrial manufacturing, transportation, mechanical equipment, electrical systems, renewable energy, and customized engineering. Our aluminum product range includes Aluminum Plates, bars, tubes, profiles, strips, foils, and structural components. This broad supply capability allows us to support projects that require more than one aluminum product.
When a buyer asks us about aluminum square tubing, we do not only ask for the outside size. We also check the alloy grade, wall thickness, length, temper, surface finish, tolerance, processing method, end use, order quantity, and delivery destination. These details matter because two tubes with the same outside dimensions may behave very differently during cutting, welding, bending, or long-term use.
Our goal is straightforward: we help customers choose an Aluminum Square Tube that fits the real job. Standard sizes can support regular production and stock needs, while custom dimensions, surface finishes, cutting services, and project-based supply plans can be arranged for special applications.
An Aluminum Square Tube is a hollow aluminum product with four flat sides and a square cross-section. It is normally manufactured through extrusion, although some special products may be formed or fabricated through other processes.
The hollow structure gives the tube a useful balance between weight and stiffness. Compared with a solid Aluminum Bar of a similar outside size, a square tube uses less material and weighs less. At the same time, its closed shape can provide good resistance to bending and twisting in frames, supports, machine guards, racks, and structural assemblies.
The flat sides also make assembly easier. Brackets, plates, hinges, fasteners, panels, and other parts can be attached to the tube without the curved contact surface found on round tubing. This is one reason why aluminum square hollow tube is common in industrial frames and modular structures.
We can supply square aluminum tubing in different alloys and tempers. Common options may include 6061, 6063, 6082, 5052, and other grades selected according to regional standards, forming requirements, strength needs, corrosion conditions, and project drawings.
Common product forms include:
Standard aluminum square tube stock
Thin-wall aluminum square tubing
Heavy-wall aluminum square tube
Structural aluminum square tube
Extruded aluminum square tube
Anodized aluminum square tube
Powder-coated aluminum square tube
Custom aluminum square tube cut to length
The right product depends on the application. A decorative frame may focus on appearance and surface uniformity. A machine base may need thicker walls, tighter straightness, and better load control. A welded structure may require an alloy and temper with suitable welding behavior.
Aluminum has a typical density of about 2.70 g/cm³, while common carbon steel is close to 7.85 g/cm³. This means aluminum is roughly one-third the density of steel.
For equipment builders, transport manufacturers, and installation teams, this weight difference can be important. Lighter parts are easier to lift, move, assemble, and transport. They may also reduce the load placed on surrounding structures.
Weight reduction does not mean that every Aluminum Tube can replace a steel tube directly. Wall thickness, alloy, temper, span, connection method, and loading direction must still be checked. We encourage customers to confirm the structural design before changing materials.
The four flat sides of an Aluminum Square Tube make it practical for frames and connected structures. Flat plates can sit directly against the tube, and alignment is usually easier than with round tubing.
This shape works well for:
Bolted frames
Welded assemblies
Machine enclosures
Display systems
Protective barriers
Mounting rails
Support structures
The square profile also gives the finished product a clean and organized appearance. This is useful when the tube remains visible after installation.
Aluminum reacts with oxygen and forms a thin oxide layer on its surface. This layer helps protect the base metal from further environmental attack.
Because of this natural behavior, aluminum square tubing is often selected for indoor and outdoor applications where untreated carbon steel may require paint, coating, or regular maintenance.
Corrosion performance still depends on the alloy, surface condition, contact materials, chemicals, humidity, and service environment. Marine, chemical, or highly polluted locations may require a suitable alloy, anodizing, coating, insulation from dissimilar metals, or additional engineering review.
Many aluminum alloys can be cut, drilled, milled, punched, tapped, welded, and assembled using normal industrial equipment. This helps customers turn standard tube stock into finished parts without a complicated production route.
Our customers commonly use custom aluminum square tube for:
Saw cutting
CNC machining
Hole drilling
Slot milling
End processing
Welding
Mechanical fastening
Surface finishing
Processing parameters should match the alloy and temper. Tool geometry, cutting speed, lubrication, clamping force, and heat input can affect the final result.
Customers may order aluminum square tubing with a mill finish or request further finishing based on appearance and service needs.
Possible surface options include:
Mill finish
Anodized finish
Powder coating
Brushed finish
Polished finish
Protective film
Custom color treatment
A surface treatment should be selected for a clear reason. Anodizing can improve surface hardness and appearance. Powder coating provides color choices and additional protection. Brushing or polishing is often used when visual quality matters.
An aluminum square tube does not contain moving parts, so it does not “work” like a machine. Its function comes from its cross-sectional shape and material properties.
When a load is applied, the four walls distribute stress around the hollow section. The closed shape provides resistance to bending and torsion while avoiding the weight of a fully solid section. This makes square tubing useful for frames, beams, posts, braces, guards, and supports.
The outside size and wall thickness are two important design factors. A larger outside size usually increases stiffness because more material is placed farther from the center of the section. A thicker wall adds material and can improve local strength, connection performance, and resistance to damage.
However, a larger or thicker tube is not automatically the right choice. It can add unnecessary weight and cost. The working load, support spacing, impact risk, joining method, and safety factor should all be considered.
For welded frames, the heat-affected zone also matters. Some heat-treated aluminum alloys lose part of their strength near a weld. Designers may need to use suitable joint geometry, reinforcement, or post-weld assumptions when calculating structural performance.
For bolted assemblies, attention should be given to edge distance, hole diameter, fastener material, local wall deformation, and galvanic corrosion between different metals.
When customers send us a project request, useful information includes:
Drawing or sketch
Outside width and height
Wall thickness
Required length
Alloy and temper
Load condition
Welding or fastening method
Surface treatment
Quantity and delivery schedule
With this information, we can coordinate a more suitable supply proposal and reduce the risk of ordering the wrong material.
The table below gives a general comparison between aluminum square tubing, carbon steel tubing, and stainless steel tubing. These values are typical engineering references rather than guaranteed values for every grade.
| Material | Typical Density | Elastic Modulus | General Corrosion Behavior | Practical Supply Consideration |
|---|---|---|---|---|
| Aluminum Alloy Tube | About 2.70 g/cm³ | About 69 GPa | Good natural resistance in many normal environments | Low weight and easy fabrication |
| Carbon Steel Tube | About 7.85 g/cm³ | About 200 GPa | May rust without coating or other protection | Higher stiffness and common structural use |
| 304 Stainless Steel Tube | About 7.9–8.0 g/cm³ | About 193 GPa | Good resistance in many industrial environments | Higher weight and generally higher material cost |
Data sources: ASM International material property references, The Aluminum Association technical data, ASTM material specifications, and commonly published engineering property tables. Exact values depend on grade, temper, product form, and test method.
This comparison shows why aluminum is often chosen for lightweight structures. Steel is stiffer, which means an aluminum part may need a different cross-section to control deflection. Stainless steel can provide strong corrosion performance, but it is much heavier. The correct decision should be based on the complete design rather than one property alone.
Industrial equipment builders use Industrial Aluminum Square Tube for bases, frames, supports, machine guards, access structures, and protective enclosures.
The flat sides allow panels, brackets, sensors, hinges, and control components to be installed in a simple way. Aluminum also helps keep the equipment easier to move during installation or maintenance.
Automation projects often change as production layouts are updated. Aluminum square tubing can be cut, drilled, and joined to build adaptable frames for conveyors, inspection systems, robotic cells, and workstations.
When a customer needs repeated frames, we can coordinate batch supply with controlled dimensions and planned delivery schedules.
Square aluminum tubing can be used in railings, screens, partitions, canopies, decorative structures, façade supports, and outdoor frames.
For visible building applications, customers normally pay close attention to color consistency, surface marks, corner shape, straightness, and coating quality. These points should be agreed before production.
Vehicle, trailer, rail, and mobile equipment manufacturers may use aluminum square tubes to reduce structural weight. Common examples include internal frames, supports, storage structures, access steps, protective sections, and body components.
The final alloy and wall thickness should be selected according to vibration, fatigue, impact, welding, and service conditions.
Aluminum square tubing can support solar equipment, battery system frames, equipment cabinets, charging systems, and other new energy applications.
These projects often require corrosion resistance, dimensional consistency, controlled weight, and reliable batch supply.
The straight lines and clean appearance of aluminum square tubing make it suitable for commercial furniture, shelves, display stands, exhibition structures, and modular systems.
Surface finish is especially important in these applications because the tube may remain visible to the end user.
Aluminum square tubes may be used for housings, frames, support structures, equipment racks, and heat-management assemblies. Because aluminum conducts heat and electricity, electrical insulation and grounding requirements should be considered during design.
A good purchasing decision starts with the application, not with a price list. Before we recommend an aluminum square tube, we look at the main working conditions and processing steps.
Different aluminum alloys are designed for different needs.
6061: Often used for structural and general engineering work because it offers a useful balance of strength, corrosion resistance, machining, and welding.
6063: Common in extrusion and architectural products because it can provide good surface quality and formability.
6082: Used in structural applications in markets where this alloy is commonly specified.
5052: Known for good corrosion resistance and forming performance, although product availability depends on the manufacturing route.
The alloy name alone is not enough. Temper also affects strength, hardness, formability, and post-processing behavior.
Square tubing is normally described by its outside width, outside height, wall thickness, and length. For a square section, width and height are the same.
An example specification may be written as:
50 mm × 50 mm × 3 mm wall × 6000 mm length
Customers should confirm whether measurements are metric or imperial. They should also state whether the dimension is nominal or must follow a specific tolerance.
Extruded aluminum square tubes normally have rounded corners rather than perfectly sharp corners. Both the outside and inside corner radius can affect fitting, machining, and the available internal space.
When the tube must fit inside another component, a drawing with corner details is helpful.
Long tubes can show some bow or twist. Standard industrial tolerances may be acceptable for general fabrication, but machine frames and precision assemblies may require tighter control.
Customers should tell us when straightness, twist, squareness, or flatness is critical.
Mill-finish tubing may show normal extrusion lines, handling marks, or color differences. This is usually acceptable for hidden structural use but may not be suitable for a visible decorative product.
For appearance-sensitive projects, samples, finish standards, protective film, and packaging methods should be discussed early.
Saw cutting, drilling, machining, welding, and surface treatment can change the final size or appearance. Buyers should include machining allowance, cutting loss, and production scrap when calculating the required quantity.
We can coordinate standard lengths or cut-to-size supply based on the order and processing plan.
Most of the Aluminum Square Tube products we supply are made through extrusion. This process is suitable for producing long hollow sections with stable cross-sectional shapes.
The basic process starts with an aluminum billet. The billet is heated to a controlled temperature so that it becomes soft enough to move through an extrusion die. A hydraulic press then pushes the billet through the die, forming a continuous square hollow section.
For hollow tubing, the die design is more complex than the tooling used for a simple solid bar. The die must form both the outside shape and the internal hollow area. Proper control of metal flow is important because uneven flow can affect wall thickness, corner shape, straightness, and surface quality.
Before extrusion starts, the required alloy and temper route must be confirmed. The alloy composition influences strength, corrosion resistance, weldability, surface treatment, and machining behavior.
The selected billet is checked according to the required production plan. Heating conditions are controlled because a billet that is too cold may require excessive extrusion force, while excessive heat can affect surface quality and dimensional control.
Once the billet reaches the suitable processing temperature, it is loaded into the extrusion press. Pressure forces the softened aluminum through the die opening.
The tube leaves the die as a long continuous profile. During this stage, operators monitor factors such as extrusion speed, temperature, profile shape, and surface condition.
Different tube sizes require different dies. A standard aluminum extruded square tube may use an existing die, while a special cross-section may require new tooling. Tooling cost, trial production, order volume, and dimensional requirements should be discussed before custom production begins.
After extrusion, the tube is cooled. Cooling may use air, water, or another controlled method depending on the alloy and production route.
The long extruded section may then be stretched slightly to reduce distortion and improve straightness. This step also helps relieve part of the internal stress created during extrusion.
Straightening must be controlled carefully. Excessive force may change dimensions or damage the surface, while insufficient control can leave the tube bowed or twisted.
Heat-treatable alloys such as 6061, 6063, and 6082 may go through solution treatment, quenching, and artificial aging to reach the required temper.
The temper has a direct effect on mechanical properties. For example, a softer condition may support forming, while an aged temper may provide higher strength for structural use.
When ordering, customers should provide the complete material designation rather than only the alloy number. A request for “6061 aluminum square tube” is useful, but “6061-T6 aluminum square tube” gives us a clearer technical target.
After extrusion and heat treatment, tubes are cut to standard production lengths or customer-specified lengths.
Additional services may include:
Precision saw cutting
Deburring
Drilling and slotting
Basic CNC machining
Anodizing
Powder coating
Brushing or polishing
Protective film application
The available processing service depends on the alloy, tube size, order quantity, tolerance, drawing, and surface requirements.
We provide standard and customized square aluminum tubing for industrial purchasing. The table below shows common supply categories rather than a fixed stock list.
| Specification Item | Typical Supply Option | What the Buyer Should Confirm |
|---|---|---|
| Outside Size | Small, medium, and large square sections | Exact width and height in millimeters or inches |
| Wall Thickness | Thin-wall, standard-wall, and heavy-wall options | Nominal wall, tolerance, and load requirement |
| Length | Standard mill lengths or cut-to-length supply | Finished length, cutting tolerance, and quantity |
| Alloy | 6061, 6063, 6082, 5052, and other available grades | Application, regional standard, and processing method |
| Temper | Various soft, solution-treated, and aged conditions | Required strength, forming, welding, and machining behavior |
| Surface | Mill finish, anodized, coated, brushed, or polished | Appearance standard, color, film thickness, and protection |
| Processing | Cutting, drilling, machining, and packaging coordination | Drawing revision, tolerance, hole position, and inspection method |
Source: Supply categories are based on common aluminum extrusion practice and the product requirements used in industrial purchasing. Final availability must be confirmed against the requested alloy, temper, die, dimensions, quantity, and applicable specification.
We do not recommend copying a size from another project without checking the actual load and connection method. A tube that works well for a display frame may not be suitable for a vehicle structure or machine base.
The following table gives a practical comparison of several alloys often discussed for aluminum tubing. Exact mechanical values depend on temper, wall thickness, testing direction, production method, and the governing standard.
| Alloy | General Strength Level | Corrosion Resistance | Fabrication Notes | Common Use |
|---|---|---|---|---|
| 6061 | Medium to relatively high | Good | Good machining and welding balance | Machine frames, structural parts, transport equipment |
| 6063 | Moderate | Good | Good extrusion behavior and surface finish | Architectural frames, visible structures, general profiles |
| 6082 | Relatively high within common 6xxx alloys | Good | Suitable for structural fabrication when properly specified | Load-bearing frames and engineering structures |
| 5052 | Moderate | Very good in many wet environments | Good forming and welding characteristics | Marine-related parts, formed components, corrosion-sensitive work |
Data sources: General alloy descriptions are based on publications from The Aluminum Association, ASM International material references, and common ASTM and EN aluminum product specifications. Buyers should use certified values from the applicable material standard and inspection document for final design.
For many general industrial frames, customers compare 6061 and 6063. The choice normally comes down to required strength, visual quality, machining, welding, and local availability.
6063 is often selected when extrusion appearance and surface treatment are important. 6061 is often considered when a stronger engineering balance is needed. However, neither alloy should be selected only from a short description. Temper and section design remain important.
We manage Aluminum Square Tube orders through a structured supply and inspection process. The inspection plan can be adjusted according to the order, drawing, applicable standard, and customer requirements.
We confirm the requested alloy and temper against production and order records. When required by the purchase agreement, supporting material documents can be coordinated.
Customers who need chemical composition records, mechanical property reports, or a specific inspection certificate should state this before the order is confirmed.
Common dimensional checks include:
Outside width and height
Wall thickness
Length
Corner radius
Straightness
Twist
Squareness
The inspection tools and sampling plan depend on the tolerance level. Standard commercial tubing may use normal production inspection, while precision components may require additional measuring records.
The surface is checked for visible issues that may affect use or appearance. These may include deep scratches, dents, stains, heavy extrusion marks, coating defects, and handling damage.
Surface acceptance should match the application. A hidden structural tube and a visible decorative tube should not use the same appearance requirement.
When required, tensile strength, yield strength, elongation, and hardness can be checked according to the applicable specification and order agreement.
Mechanical values should be taken from the actual governing standard or approved material certificate. Generic website values should not be used as the only basis for engineering calculations.
For cut, drilled, or machined products, we may check:
Cut length
End squareness
Hole diameter
Hole position
Slot dimensions
Burr condition
Part quantity
Clear drawings reduce mistakes. We recommend using one controlled drawing revision and marking all critical dimensions, tolerances, and inspection points.
Long aluminum tubes can be damaged by bending, collision, moisture, and poor lifting practices. Packaging should protect both the shape and the surface.
Depending on the product and delivery route, packaging may include:
Protective wrapping
Bundled tube packs
Wooden supports
Reinforced wooden cases
Moisture-resistant material
Corner protection
Surface film
Shipping marks and labels
Thin-wall tubing requires special care because excessive banding pressure may deform the section. Decorative products may also need separators to reduce surface rubbing.
We arrange transportation according to tube length, package size, order volume, delivery destination, and customer schedule. Options may include professional logistics, dedicated transport, container shipment, and other international freight solutions.
Standard specifications may be prepared from available production or stock resources. Custom sizes, special alloys, new dies, surface treatment, and secondary processing require additional planning.
For project orders, it is useful to provide:
Expected annual or total quantity
Required batch size
Target delivery date
Delivery destination
Packaging restrictions
Inspection document requirements
This information helps us build a realistic production and shipment plan.
We focus on aluminum and related products. Our supply range covers aluminum plates, bars, tubes, profiles, strips, foils, and customized structural parts.
This allows us to support customers who need several product forms within the same project rather than managing each requirement through a separate source.
We help buyers compare alloy, temper, dimensions, surface, processing, and delivery options. Our recommendation is based on the information the customer provides, including drawings and working conditions.
When a technical requirement is unclear, we point it out before production instead of treating every square tube as the same product.
We support standard Aluminum Square Tube Stock as well as project-based customization. Depending on the order, we can coordinate dimensions, cutting, surface finishing, packaging, and inspection requirements.
Our service covers requirement communication, product selection, production coordination, quality inspection, packing, shipment, and after-sales communication.
This integrated process helps customers reduce purchasing complexity and maintain clearer control over orders.
We support bank transfer, corporate payment, and commonly used international trade settlement methods according to the order agreement.
For overseas shipments, we coordinate packaging and transportation based on the tube dimensions and delivery requirements. Necessary commercial documents can be prepared according to the transaction and destination.
It is used for machine frames, construction structures, transport equipment, railings, furniture, display systems, automation equipment, electrical frames, solar supports, guards, racks, and custom fabricated products.
Neither shape is always stronger. Performance depends on outside size, wall thickness, alloy, temper, load direction, span, and connection method. Square tubing is convenient for flat connections and frame construction, while round tubing can perform well under torsion and loads from different directions.
6061 is commonly selected for general engineering and structural work because of its strength and machining balance. 6063 is widely used for extruded and architectural products where surface finish and extrusion behavior are important. The required temper and dimensions must also be considered.
Yes. Custom dimensions may be arranged according to production capability, die availability, order quantity, alloy, tolerance, and technical requirements. New tooling may be needed for a special section.
Many common aluminum alloys can be welded. The welding process, filler material, heat input, joint design, and expected strength near the weld should be reviewed. Heat-treated alloys may lose strength in the heat-affected zone.
Yes. We can coordinate anodizing, powder coating, brushing, polishing, and other finishing options based on the product and order requirements.
Cut-to-length service can be arranged. Please provide the finished length, cutting tolerance, quantity, end condition, and packaging requirement.
Please provide the alloy, temper, outside size, wall thickness, length, quantity, surface finish, processing requirements, applicable standard, delivery destination, and requested delivery time. A drawing is recommended for custom products.
Store it in a clean, dry, ventilated area away from corrosive chemicals. Long tubes should be supported evenly to reduce bending. Decorative surfaces should be protected from rubbing, dirt, and moisture.
Yes. We support international orders and arrange suitable shipping methods according to tube length, package dimensions, order volume, and destination.
At Shandong Hanglv International Trade Co., Ltd., we supply Aluminum Square Tube products for standard purchasing, repeated manufacturing, and custom engineering projects.
We can help you compare aluminum alloys, confirm sizes, coordinate processing, manage inspection, and arrange protected international delivery. Whether you need aluminum square hollow tube for a machine frame, anodized tubing for a visible structure, or custom-cut material for batch production, we will build the supply plan around your actual requirements.
Send us your specification, drawing, quantity, application, and delivery destination. We will review the details and provide a practical quotation for your project.
Tel: +86 15053549810(Ms Zhuang)
+86 15563845999 (Mr Yu)
whatsapp: 86150535649810
Email: beckyzhuang@sdhanglv.com
Address： Huawei Big Data Industrial Park, South of Xinmin Street, Dongjiang Street,Longkou City, Yantai City, Shandong Province
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