What alloy is best for extrusion?

Aluminum Alloy 6000 series

Applications that require greater strength and durability tend to require the use of structural 6000 series alloys, including 6061 and 6063 aluminium alloys. This particular alloy can be used in designs that require high-quality resistance to corrosion and moderate strength. Each alloy has a different series of properties, including the way it behaves during extrusion, fabrication and finishing. By adding different elements with the aluminium, we are able to further prevent corrosion through design and create superior results, when we choose to extrude aluminium alloys.

Aluminium 6061 and Aluminum 6063 are similar in composition and mechanical properties. Both 6061 aluminium and 6063 aluminium are popular for extrusions. Both alloys contain magnesium for increased strength and silicon to reduce the melting temperature. Commons uses for aluminium include transportation components, recreation products, machinery and equipment, and consumer durables.

6061 Aluminium or 6063 Aluminium: Which is Best for Your Project?

If you need an aluminium alloy with a high strength-to-weight ratio, that offers good machinability and weldability, 6061 aluminium will meet your needs.

If your project requires an aluminium alloy that can be extruded, with great corrosion resistance and good surface quality, 6063 aluminium is best suited for your project requirements.

Differences Between AL 6061 and AL 6063

While 6061 AL and 6063 AL have commonalities, the differences between the 2 alloys can help you determine which alloy is best suited for your needs. For applications that require higher strength, 6061 or 6082 are typically used. Their slightly different characteristics make each one a better choice for different applications.

  • 6061 aluminium has a lower melting temperature, lower thermal conductivity, and lower heat capacity.
    • AL 6061-T6 has a higher yield strength and fatigue strength when compared to AL-T6 6063.
    • It is also less corrosion resistant than AL 6063.
  • When compared to 6061 AL, 6063 aluminium has a higher melting temperature, higher thermal conductivity, and higher heat capacity.
    • AL 6063 has a better surface finish than AL 6061 and is preferable for architectural purposes.

Aluminum Alloys 6061 vs. 6063 Infographic