Understanding Wall Thickness and Hardness in Industrial Aluminum Profiles

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In the world of industrial aluminum profiles, customer preferences often dictate the desired wall thickness, with some requiring thick walls for specific applications. However, the relationship between wall thickness and hardness is crucial to understand, especially in the context of grade 6063-T5 aluminum profiles. Let’s delve into the principles behind aluminum profile extrusion and how they influence hardness.

Principles of Aluminum Profile Extrusion

Aluminum profile extrusion involves heating cylindrical aluminum rods and passing them through a die to achieve the desired shape. Thinner walls experience greater extrusion force, leading to increased metal deformation and tighter metal grain arrangement, resulting in higher hardness. Conversely, excessively thick walls undergo less deformation during extrusion, leading to minimal changes in metal structure and lower hardness.

Factors Influencing Hardness in Industrial Aluminum Profiles

The thickness of the profile wall directly impacts the force required for deformation during extrusion. Thicker walls experience less deformation, resulting in a metal structure closer to the raw aluminum rod and lower hardness. Additionally, hardness is measured using a Webster hardness tester, with penetration depth inversely proportional to hardness.

Implications for Industrial Aluminum Profile Manufacturers

Manufacturers must balance customer requirements for wall thickness with the need to maintain adequate hardness. Customization options should consider the desired balance between wall thickness and hardness to meet specific application needs. Quality assurance procedures, including hardness testing, are essential to ensure compliance with national standards and customer expectations.


Understanding the relationship between wall thickness and hardness is essential for manufacturers and customers alike in the industrial aluminum profile industry. By considering factors such as extrusion force, metal structure, and hardness testing, manufacturers can produce profiles that meet the diverse needs of their customers while maintaining quality and performance standards.

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