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Essential Factors that Affects the Aluminum Extrusion Process

by Nice Rapid | Feb 26,2021 | Aluminum Extrusion

If there is a method that could shape an aluminum metal, then extrusion is the answer. Aluminum extrusion is a standard process that manipulates aluminum into shape by forcing the raw heated material. The extruded material usually comes out as a long piece and is cut according to the specifications.

For skilled craftsmen, the job may be easy but for us who are not, it seems hard. Imagine forcing heated metal through a die. That is how the extrusion process is done. Aluminum extrusion has plenty of roles in the metal fabrication industry.

To know more about how the process is done, we need to look into the factors that affect aluminum extrusion.

The Extrusion Process

The aluminum extrusion process begins with choosing the standard extrusion die or in some cases, with a customized die to manufacture the desired shape. When the die is prepared, the extrusion process will begin. Billets of raw aluminum of specific size and weight are heated to a specific temperature and pushed through the standard or customized die. Additional pressure is applied to press the metal and the product will be cut according to the requirements.

Factors Affecting Aluminum Extrusion

Here are the factors that affect the extrusion process.

1. Quality of Material

For a material to be suitable for the extrusion process, it should have a degree of ductility. The material will be forced through a die, so it should bend or form into a shape. When we say ductility, the metal crystals or grains should be able to slide against one another instead of getting locked rigidly into place. If it does the material will be brittle like in the glass.

2. Temperature

Aluminum is heated during the extruding process because it increases grain mobility or ductility. With greater ductility, it minimizes the force needed to push it through a die. Heating can also affect the recrystallization or the formation of new grains when heat and pressure are applied. In extrusion, the new grains swallow the old ones as the aluminum metal passes through the die. This behavior of metal contributes to the elongation and strength of the finished product.

3. Extrusion Speed

The extrusion speed has also an impact on the grain size, grain orientation, and surface finish. To produce a consistent extruded section, the temperature and the speed should be at par to maintain a stable process.

4. Pressure

Another factor to monitor is pressure. With pressure, the metal is pressed through the profile and creates the actual extrusion. The objective of heating is to get the metal to its recrystallization temperature and to require the least possible force.


In aluminum extrusion, consistency is the key. It was a reliable process because you know what you are going to get at the end of the process and how it will behave. There is no limit on the applications of extruded parts. As long as you think you will benefit from the process, then aluminum extrusion is a good choice.

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