A 3-1/2″ aluminum round bar 6061-T6 is a solid cylindrical rod made from 6061 aluminum alloy, with a diameter of 3-1/2 inches (3.500″). This size is typically used for large, heavy-duty structural, mechanical, and custom-machined components where high strength, durability, and resistance to corrosion are necessary, while also taking advantage of the lightweight characteristics of aluminum.

📐 Basic Specifications:

• Diameter: 3-1/2 inches (3.500″ or ~88.90 mm)
• Material: Aluminum Alloy 6061
• Temper: T6 (solution heat-treated and artificially aged)
• Shape: Solid round bar (not hollow)

🧪 6061-T6 Aluminum Properties:

• Tensile Strength: ~45,000 psi
• Yield Strength: ~40,000 psi
• Hardness: Brinell ~95
• Corrosion Resistance: Excellent — highly resistant to corrosion, making it ideal for marine, outdoor, and industrial environments
• Machinability: Excellent — easily cut, drilled, milled, and turned
• Weldability: Excellent — works well with both MIG and TIG welding processes

🔧 Common Uses for 3-1/2″ Round Bar:

• Shafts, spindles, and axles for large and heavy-duty machinery and equipment
• Pins, standoffs, and dowels for large mechanical assemblies
• Heavy-duty structural rods or support beams in industrial applications
• Custom machined parts for high-stress or critical applications
• Tooling, fixtures, and die components
• Automotive, aerospace, and marine applications
• Heavy-duty DIY projects, prototyping, and industrial fabrication

A product may be produced up to several thousandths of an inch over or under the stated thickness and still be within “mill tolerance”.

This does NOT apply to Cut To Size items. Those will be +.125”, -0.00” tolerances.