A 4-1/2″ aluminum round bar 6061-T6 is a solid cylindrical rod made from 6061 aluminum alloy, with a diameter of 4-1/2 inches (4.500″). This size is typically used for large, heavy-duty structural, mechanical, and custom-machined components that require a high level of strength, durability, and resistance to corrosion, while still benefiting from aluminum’s lightweight properties.

📐 Basic Specifications:

• Diameter: 4-1/2 inches (4.500″ or ~114.30 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 — can be easily drilled, milled, cut, and turned
• Weldability: Excellent — works well with MIG and TIG welding processes

🔧 Common Uses for 4-1/2″ Round Bar:

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