6063 Aluminum Square Tubes
About 6063 Aluminum Square Tubes
6063 aluminum square tube provides excellent corrosion resistance, a smooth surface finish, and good weldability. Conforms to ASTM B221 specifications and is ideal for architectural and decorative applications. In-stock with custom cutting available.
Quick Facts
- Material: 6063 Aluminum
- ASTM Standard: B221
- Temper/Condition: T5
- Available Sizes: 3" x 3" square, 0.250" wall
- Location: Los Angeles warehouse
- Services: Custom size, same-day pickup
Overview
6063 aluminum, often called "architectural aluminum," is an alloy with magnesium and silicon as its primary alloying elements. It is known for having a very smooth surface finish, high corrosion resistance, and being highly suitable for anodizing. Its lower strength compared to 6061 is offset by its superior extrudability, allowing for the creation of complex cross-sections with tight dimensional tolerances. It is most commonly available in the T5 temper.
As a square tube, this material provides a combination of light weight and structural utility, making it a preferred choice for applications where aesthetics are as important as function. The uniform shape and clean lines are ideal for framing, decorative trim, and consumer products. Its hollow profile offers a good strength-to-weight ratio for light-duty load-bearing applications, such as display fixtures, sign frames, and custom furniture construction where visual appeal is paramount.
Technical Specifications
Mechanical Properties (6063-T5)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 27,000 | PSI |
| Yield Strength | 21,000 | PSI |
| Elongation | 12 | % |
| Hardness | 60 | HB |
Applicable Standards
- ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes.
Common Applications
- Architectural & Construction: Window frames, door frames, and storefronts - benefits from high corrosion resistance and excellent finish.
- Fencing & Enclosures: Posts and rails for modern fences and gates - lightweight and weather-resistant.
- Fixtures & Displays: Retail shelving, product display stands, and trade show booths - easy to fabricate and visually appealing.
- Furniture: Legs, frames, and supports for contemporary indoor and outdoor furniture.
- Marine: Railings and non-structural components on boats - resists saltwater corrosion.
- Signage: Frames for indoor and outdoor signs - provides a clean, rigid structure.
- Automotive: Decorative trim and roof racks - valued for its light weight and aesthetic qualities.
- Lighting: Housings and fixtures for LED lighting - good thermal conductivity and can be extruded into complex shapes.
Working with 6063 Aluminum Square Tubes
Machining
6063 aluminum has fair machinability. It is softer than 6061 and can be slightly "gummy," so using sharp tools, high speeds, and proper lubrication is recommended to achieve a clean cut and prevent material buildup on the cutting tool.
Welding
This alloy has excellent welding characteristics. It can be readily welded using TIG (GTAW) or MIG (GMAW) processes. 4043 filler rod is a common choice. The heat-affected zone will lose some strength, returning to an annealed state.
Finishing
6063 is the premier aluminum alloy for finishing. Its smooth surface is ideal for anodizing, producing a clear, durable, and corrosion-resistant layer. It is also an excellent substrate for powder coating and painting for a wide range of decorative colors.
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Frequently Asked Questions
Q: What is the main difference between 6063 and 6061 aluminum tube?
A: The primary difference is strength versus finish. 6061-T6 is significantly stronger (45,000 PSI tensile strength) and is used for structural applications. 6063-T5 (27,000 PSI tensile strength) has a superior surface finish, is easier to extrude into complex shapes, and is better for anodizing, making it the choice for architectural and decorative work.
Q: Can I use 6063 aluminum tube outdoors?
A: Yes. 6063 has excellent corrosion resistance, making it ideal for outdoor applications like railings, window frames, and outdoor furniture. For maximum durability, an anodized or powder-coated finish is recommended.
Q: Is 6063 tube good for structural projects?
A: 6063 is suitable for light-duty structural applications where loads are minimal, such as sign frames, display booths, or furniture. For projects requiring higher load-bearing capacity, such as vehicle frames or building supports, the stronger 6061-T6 alloy is the correct choice.
Stock & Custom Sizes
Available sizes: 3"×3" square. Wall thickness: 0.250". Standard lengths: 20 ft. Custom size available.
Same-day cutting and Los Angeles pickup available.
View Sizes & PricingNeed 6063 Aluminum Square Tubes? Contact Bobco Metals for availability and Los Angeles pickup.
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