Choosing Curved Aluminum Extrusions Based on Material Properties

Curved aluminum extrusions are widely used in various industries, including automotive, aerospace, construction, and consumer electronics. The choice of the right material for curved aluminum extrusions is critical to ensure optimal performance, durability, and cost-effectiveness. This article provides a comprehensive guide to choosing curved aluminum extrusions based on material properties.

Strength and Hardness

The strength and hardness of an aluminum extrusion are crucial factors when considering its ability to withstand stresses and deformation. Different aluminum alloys offer varying levels of strength and hardness. 6000 series alloys, such as 6061 and 6063, provide a good balance of strength and ductility, making them suitable for applications requiring both strength and formability. 7000 series alloys, such as 7075, offer exceptional strength but are less ductile.

Ductility and Formability

Ductility refers to the ability of an aluminum extrusion to undergo plastic deformation without fracturing. Formability is the ability to shape the extrusion into complex geometries. 5000 series alloys, such as 5052 and 5083, possess excellent ductility and formability, making them ideal for applications requiring bending, shaping, or rolling. 6000 series alloys offer a moderate level of ductility and formability.

Corrosion Resistance

Corrosion resistance is vital for aluminum extrusions exposed to harsh environments. 6000 series alloys have good corrosion resistance, making them suitable for use in marine and coastal applications. 7000 series alloys offer even better corrosion resistance, making them ideal for highly corrosive environments. Aluminum extrusions can also be anodized to further enhance their corrosion resistance.

Weldability

Weldability is an essential consideration if the extrusion will be subjected to welding processes. 6000 series alloys are generally considered to have good weldability, while 7000 series alloys may require special welding techniques due to their higher strength and lower ductility.

Surface Finish

The surface finish of the extrusion affects its appearance and functionality. 6000 series alloys can be polished to a high shine, making them aesthetically appealing. 7000 series alloys may have a more matte finish due to their higher strength, which can be beneficial for applications where surface roughness is not a concern.

Cost

The cost of the aluminum extrusion is a significant factor in the selection process. 6000 series alloys are generally more cost-effective than 7000 series alloys due to their wider availability and lower alloying content.

Other Considerations

In addition to the material properties discussed above, other factors to consider when selecting curved aluminum extrusions include:

– Extrusion size and shape

– Tolerances and specifications

– Lead time and availability

By carefully considering the material properties and other factors discussed in this article, engineers and designers can make informed decisions when choosing curved aluminum extrusions for their specific applications.