Overview

6061 aluminum rectangular tubes are the industry standard for structural and fabrication projects requiring an optimal balance of strength, weldability, and corrosion resistance. As a precipitation-hardened alloy primarily composed of magnesium and silicon, 6061 aluminum is the most versatile and widely used heat-treatable aluminum alloy available. It is typically supplied in the T6 temper, which signifies solution heat treatment followed by artificial aging, resulting in excellent mechanical properties.

From a technical overview, 6061 aluminum rectangular tubes offer a unique combination of attributes. The rectangular shape provides high strength-to-weight ratios and superior rigidity compared to round tubes in many applications, making them ideal for frames and supports. This alloy demonstrates good machinability and can be easily welded using all common methods, including TIG and MIG. Its corrosion resistance is excellent, particularly when specified with an Alclad finish, which adds a sacrificial layer of high-purity aluminum for enhanced protection.

The applications for 6061 aluminum rectangular tubes are extensive across B2B and industrial sectors. They are a primary choice for constructing machine frames, robotic arms, conveyor systems, and custom fabrication projects. In transportation, these tubes are used for truck and trailer bodies, railcar components, and marine frames. The architectural and construction industries utilize them for handrails, curtain walls, and structural supports where light weight and durability are critical. Furthermore, they are essential in fabricating workstations, safety cages, and custom industrial equipment.

The primary advantages of choosing 6061 aluminum rectangular tubes include their exceptional versatility, high strength comparable to many steels at a fraction of the weight, and outstanding resistance to corrosion. Their excellent weldability and formability allow for complex fabrications without compromising material integrity. For businesses, this translates to durable, long-lasting products that reduce maintenance costs and improve performance in demanding environments. Our inventory of 6061 rectangular tubes is ready to meet your project specifications with consistent quality and reliable supply.

Specifications

• Standard: ASTM B221
• Alloy: 6061
• Temper: T6 (Solution Heat Treated and Artificially Aged)
• Cross-Section: Rectangular Hollow Tube
• Wall Thickness Tolerance: 10%
• Straightness Tolerance: <0.125 inches per foot
• Chemistry: Conforms to ASTM B221 standards (Mg: 0.8-1.2%, Si: 0.4-0.8%, Cr: 0.04-0.35%)

Applications

• Structural Framing: Machine bases, robotic frames, workstations, and safety guards
• Transportation: Truck and trailer flooring supports, railcar components, marine structures
• Architecture & Construction: Handrails, window frames, curtain wall systems, and light structural supports
• Industrial Machinery: Conveyor system supports, material handling equipment, and custom fabrications
• Aerospace & Defense: Non-critical airframe components, ground support equipment, and tactical hardware
• Consumer Products: Bicycle frames, tactical flashlight bodies, and custom fabrications

Weldability

• Excellent weldability using TIG, MIG, plasma arc, and resistance welding
• Recommended filler metals: 4043 or 5356 aluminum alloy
• Proper pre-weld cleaning essential for oxide layer removal
• Can be furnace brazed with appropriate aluminum brazing alloys
• Good for both fusion and solid-state welding techniques

How to Measure

Order Checklist

• Alloy: 6061 Aluminum
• Temper: T6
• Outside dimensions (Width ? Height)
• Wall thickness
• Required Length and Quantity
• Cutting instructions and tolerances
• Surface finish requirements (mill, anodized, Alclad)
• Certifications (MTR, material test reports)
• Packaging and shipping instructions