The 6063-T5 aluminum profile is an extruded architectural alloy composed primarily of aluminum, magnesium, and silicon. The "T5" temper indicates that the metal is cooled in air directly from the extrusion press (around 500°C) and then artificially aged in an oven. It offers a yield strength of ≥110 MPa, excellent extrudability, and a flawless surface finish ideal for anodizing.
Chemical Composition of 6063-T5 Aluminum Tube
To understand why this material performs the way it does on the factory floor, you must look at its chemistry. 6063 is an Al-Mg-Si alloy. Magnesium increases strength, while silicon lowers the melting point and improves the metal's flow during the extrusion process.
| Element | Content (%) |
|---|---|
| Aluminum (Al) | Balance |
| Silicon (Si) | 0.20–0.60 |
| Magnesium (Mg) | 0.45–0.90 |
| Iron (Fe) | ≤0.35 |
| Copper (Cu) | ≤0.10 |
| Manganese (Mn) | ≤0.10 |
| Zinc (Zn) | ≤0.10 |
| Chromium (Cr) | ≤0.10 |
Mechanical Properties of 6063-T5 Aluminum Sheet and Extrusions
Engineers cannot design curtain walls or machine frames based on vague terms like "strong." You need accurate load-bearing data. The T5 artificial aging process (typically holding the metal at 175°C for 6 to 8 hours) stabilizes the grain structure, providing the following mechanical baseline.
| Property | Metric Value | Imperial Value |
|---|---|---|
| Ultimate Tensile Strength | ≥150 MPa | ≥21,750 psi |
| Yield Strength | ≥110 MPa | ≥16,000 psi |
| Elongation at Break | ≥8% | ≥8% |
| Hardness (Webster) | ≥8 HW | - |
| Thermal Conductivity | ~200 W/m·K | - |
Are you designing a new custom extrusion profile?
Wall thickness and complex hollows dictate the final strength. Send your CAD (.dwg) files to the GNEE engineering team. We will check the extrusion feasibility and provide a fast custom 6063-T5 aluminum profile supplier quote within 24 hours.
Why Choose 6063-T5 Aluminum Round Pipe?
Why is 6063-T5 the default standard for 80% of architectural and structural framing worldwide? It is not the strongest aluminum (6061 and 7075 are stronger), but it provides the most cost-effective balance of the following traits.
1. Extrudability and Die Life
The primary reason factories prefer 6063-T5 is its extrudability. Because the metal flows smoothly through complex steel dies at high temperatures, manufacturers can create highly intricate cross-sections-such as multi-cavity hollows, extremely thin walls (down to 0.8mm), and tight interlocking joints. This smooth flow also extends the life of the extrusion die, keeping tooling costs low for custom orders.
2. Premium Surface Finish and Anodizing Response
If the final product is visible to the consumer, 6063-T5 is mandatory. Because it is air-cooled on the run-out table rather than violently water-quenched like T6, the surface remains incredibly smooth with minimal thermal stress lines. It accepts clear, bronze, and black anodizing exceptionally well. A standard 10 to 15-micron anodic oxide film provides excellent weather resistance while maintaining a premium metallic look.
3. Weldability
In fabrication shops, 6063-T5 aluminum tube is frequently welded to build frames. It is highly weldable using TIG (Tungsten Inert Gas) or MIG (Metal Inert Gas) processes. The standard filler wire recommended is ER4043, which provides excellent fluidity and minimizes weld cracking. Note for engineers: Welding will naturally reduce the strength of the metal in the heat-affected zone (HAZ).
Industrial Applications of Custom 6063-T5 Aluminum Profile
The real-world applications of this alloy are defined by its environment and load requirements.
- Architectural and Facade Systems: This is the highest-volume application. Due to its corrosion resistance against rain and urban pollution, it is the standard material for commercial curtain walls, window and door frames, glass partition channels, and louvers.
- Thermal Management (Heat Sinks): With a thermal conductivity of 200 W/m·K, 6063-T5 is heavily utilized in the electronics sector. It is extruded into complex finned heat sinks for LED lighting housings, computer processors, and industrial power supplies. The T5 temper allows for the extrusion of very tall, thin cooling fins that other alloys would break during.
- Modular Assembly and T-Slot Framing: The industrial automation sector relies on 6063-T5 for structural framing (like 2020, 4040, and 8080 aluminum extrusions). It provides sufficient rigidity for conveyor supports, safety enclosures, and robotic arms, while allowing for easy cutting and bolting.
- Transportation and Interiors: Used extensively for interior trims, luggage racks, and handrails in trains, buses, and marine vessels where weight reduction directly improves fuel efficiency.
Processing and Machining 6063-T5 Aluminum Square Tube
When raw material arrives at a fabrication facility, how it behaves under tools is critical.
- Cutting: Standard carbide-tipped circular saws cut through 6063-T5 cleanly without excessive burrs, provided proper cutting fluid is used.
- Bending: T5 is highly favored for bending operations. Because its yield strength is lower than T6, it can be bent using rotary draw benders or roll benders into arches for windows or handrails with a much lower risk of cracking on the outer radius.
- Machining: While not a free-machining alloy like 2011, 6063-T5 can be drilled, milled, and CNC machined easily. High spindle speeds and sharp tooling are required to prevent the aluminum from adhering to the cutting bit.
GNEE Factory Supply Capability for 6063 Aluminum Extrusions
Sourcing aluminum profiles internationally is not just about material specs; it is about reliable supply chain management. Buyers frequently encounter issues with poor tolerances, surface scratches, and delayed shipments. GNEE operates as a direct 6063 aluminum extrusion manufacturer to eliminate these risks.
- Production Equipment and Capacity:
We operate multiple extrusion press lines ranging from 600 tons to 3000 tons. This means we can supply micro-extrusions for electronics as well as massive structural frames up to 300mm in cross-section. Our automated run-out tables ensure consistent air-cooling, guaranteeing that the T5 temper is uniform across the entire length of the profile.
- Strict Export Packaging Standards (No Scratches):
A single scratch during sea freight can ruin a decorative profile. GNEE enforces a mandatory export packaging protocol for all orders:
- Interleaving: Each piece of anodized 6063-T5 aluminum square tube is individually separated by EPE (pearl cotton) foam or thick kraft paper.
- Bundling: Profiles are bundled and tightly wrapped in waterproof shrink film to prevent oxidation from salty ocean air.
- Crating: The bundles are secured inside fumigated wooden crates or strapped tightly to solid wooden pallets to prevent shifting inside the container.
Pro-Tip for Buyers: We recommend ordering profiles in 5.8-meter lengths. This maximizes the loading efficiency of a standard 20-foot shipping container, significantly reducing your per-ton freight cost.
Ready to buy extruded 6063 aluminum tubing?
GNEE maintains standard profiles in stock and offers rapid die creation for custom shapes. Send us your requirements (alloy, temper, dimensions, surface finish, and quantity) today to get the most competitive 6063-T5 aluminum price based on current raw ingot costs.
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