Aluminum Square Bar

Precision Aluminum Square Bar in 1100, 3003, & 6061 Grades

Action Stainless offers aluminum square bar in a wide range of sizes and high-performance grades to support structural, architectural, and industrial applications. Known for its strength, corrosion resistance, and workability, aluminum square bar is a dependable material choice for everything from architectural trim to precision-machined components.


We supply square bar in 1100, 3003, and 6061 grades—each engineered to meet a variety of mechanical and surface requirements. Standard and custom-cut dimensions are available to meet your exact fabrication needs.

Finishes & Processing Services

Our aluminum square bar is typically stocked in a clean mill finish that’s ideal for general fabrication, machining, and welding. For applications where appearance or environmental durability is critical, brushed and anodized finishes are available upon request. Action Stainless supports high-accuracy and ready-to-use material delivery through in-house processing that includes saw cutting, milling, and CNC machining. These services ensure each bar meets your project’s tolerance, length, and finish requirements—delivered on time and to spec.

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Available Styles and Materials

We stock aluminum square bar in:

  • 1100 Aluminum Square Bar

    Commercially pure with excellent corrosion resistance and formability; ideal for light-duty structural and decorative use

  • 3003 Aluminum Square Bar

    Corrosion-resistant and easy to weld; used in architectural details, HVAC components, and trim work

  • 6061 Aluminum Square Bar

    High strength with good machinability; suited for structural supports, fixtures, and precision-machined parts

  • Mill Finish

    Standard surface for machining, fabrication, or welding

  • Anodized/Brushed Finish

    Offered for architectural or corrosion-sensitive environments

This range supports a variety of industries from construction and transportation to architectural design and custom manufacturing.

Aluminum Square Bar Specifications

Aluminum products used in square bar fabrication are available in the following specifications:

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Grades Offered: 1100, 3003, and 6061: suited for machining, structural, and marine applications with varying strength and surface finish characteristics.

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Product Forms: Square bar ranging from 1/8" to 3", available in standard stock and cut-to-length configurations.

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Finishes: Mill finish standard; brushed and anodized options available by request.

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Processing Capabilities: Saw cutting, CNC machining, milling, and custom packaging or kitting for delivery-ready precision.

These material options and fabrication services support a wide range of industrial, architectural, and custom expanded metal applications.

Aluminum Square Bar Applications

Aluminum square bar is commonly used in:

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Architectural Components: Columns, trim, handrails, spacers, balusters

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Machined Parts: Blocks, pins, spacers, tool bases, threaded fasteners

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Structural Supports: Frames, rails, brackets, ladders, fixtures

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Transportation Equipment: Tie-downs, framing, utility body reinforcements, truck beds, step supports

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Fabrication Projects: Signs, enclosures, jigs, mounts, furniture frames