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