Aluminum 6063-T52 Hollow Rectangular Bar 4in x 4in - Durable Extruded

In this review the Aluminum 6063-T52 Hollow Rectangular Bar is evaluated for fabricators, builders and hobbyists who need a clean, extrudable structural tube. The bottom line: it is best for projects that require a lightweight, corrosion-resistant profile with a high-quality surface finish and predictable dimensions. For anyone needing a strong, weldable rectangle for door and window frames, railings, or heatsinks, this bar delivers reliable material properties and good value without unnecessary frills.

Key Features

• Corrosion resistance: The 6063-T52 alloy offers good resistance to general corrosion, making it suitable for indoor and sheltered outdoor use.
• Weldability: It is easily welded or brazed, which helps when joining frames, railings or custom assemblies.
• Extrudability and finish: High extrudability yields straight runs and a high quality surface finish that reduces post-machining time.
• Structural dimensions: The 4in x 4in with 1/4in wall thickness provides a useful balance of stiffness and light weight for furniture, conduit, and supports.
• Mechanical strength: A minimum tensile strength of 22 ksi gives predictable performance for non-critical structural uses and fittings.
• Versatile uses: Common applications include door and window frames, electrical components, railings, and heatsinks where good thermal and corrosion behavior matter.

Who It's For

This bar is aimed at metal fabricators, builders, makers and DIYers who need a reliable rectangular aluminum tube in a standardized length and wall thickness. It suits projects where a clean finish, ease of welding and consistent dimensions are more important than maximum structural capacity.

It is not intended for primary structural members in heavy load-bearing installations or highly abrasive outdoor exposures without appropriate surface protection. Customers needing thicker walls, exotic alloys or certified high-strength fittings should consider other alloys or steel alternatives.

Pros & Cons

Pros

• Good corrosion resistance for many architectural and interior uses.
• Easy to weld or braze, simplifying assembly and repairs.
• Precision dimensions and a smooth sanded finish reduce fit-up time for projects.
• Versatile for railings, frames, heatsinks and furniture thanks to its extrudability.

Cons

• Some customers report occasional dings or scratches on delivery, so careful inspection on receipt is advised.
• Fit can be tight for certain pre-existing openings, so verify dimensions before final installation.

Specifications

Alloy	Aluminum 6063-T52
Specification	AMS QQ-A-200/9, ASTM B221
Outer size	4in x 4in
Wall thickness	1/4in
Length	36in
Tensile strength	Min 22 ksi

Our Verdict

The Aluminum 6063-T52 Hollow Rectangular Bar is a practical choice for fabricators and hobbyists who need a clean extruded profile with good corrosion resistance and easy weldability. It represents solid value for non-critical structural and architectural uses where dimensional accuracy and surface quality matter more than maximum strength.

Frequently Asked Questions

Is this bar weldable?
Yes, the 6063-T52 alloy is easily welded or brazed for typical frame and railing assemblies.

Will it resist outdoor corrosion?
It has good resistance to general corrosion and is suitable for sheltered outdoor use, though harsher environments may need additional protection.

Are dimensions precise enough for tight fits?
Dimensions are generally precise and customers report accurate sizing, but some have found tight fits so measure openings before installation.