Which Kinds of Aluminum Are Commonly Used in CNC Machining?

by Reece

Aluminum is ideal for CNC machining since it is very machine able and reasonably priced. 3 possible processing steps or even four times more quickly than other common machining materials, such as steel and platinum. It is perfect for usage as the outside skin panels of various modes of the journey, from cars and trains to boats and planes, because of its adaptability and excellent strength-to-weight ratio.

Aluminum has replaced the heavier metals that were formerly utilized to create components and internal structures due to a greater emphasis on fuel efficiency and “lightweight” aluminum cnc machining is ideal since it is very machine able and reasonably priced. Due to its great corrosion resistance, it does not require the extensive protection from corrosion that other substances frequently do.

Why do CNC Machines Favor the Usage of Aluminum as a Material?

Due to its advantageous characteristics, such as low density, excellent resistance to rusting, superior heat transfer, and outstanding machinability, aluminum is preferred for CNC machining.

How does Aluminum Undergo CNC Machining?

The CAM (computer-aided manufacturing) program subsequently converts the CAD model into machine instructions. Following these guidelines, CNC machines use a variety of cutting tools to accurately cut and shape aluminum stock into the desired product.

What are the CNC aluminum machining precision and tolerance parameters?

The functionality and usability of the manufactured components for the uses for which they are intended are critically influenced by the accuracy and tolerance level of aluminum CNC machining. The degree to which the actual dimensions of a machined product correspond to the desired dimensions stated in the design is referred to as accuracy.

Aluminum CNC Machining Types

In order to create an alloy, molten aluminum is combined with other elements like copper, lithium, magnesium, manganese, silicon, and zinc. The additional intrinsic qualities of aluminum are additionally improved by these alloys. The three most common categories for classifying alloys for CNC machining are as follows of aluminum:

Alloys of cast aluminum

Cast translates as being formed while molten or liquid. About two-thirds of the aluminum used in cars comes from the car industry, which also uses the most cast alloys. Engine components, housings, guiding columns, and progressively structural supports are built of cast metals.

As a result of their low temperature and the adaptability of molds, cast alloys are less expensive to create. They additionally offer a wider variety of shapes. However, they are more abrasion-resistant on cutting tools, tend to have lower tensile strength than wrought alloys, and are more difficult to process.

Aluminum Lithium (Al-Li) alloys

Al-Li alloys are frequently utilized in the aircraft industry for fuselages, inner wing components, and lower wing skins. And fans because of this property. They are also used in rockets for space flight and race cars. Al-Li alloys’ positives in terms of weight are counterbalanced by their lower machinability and reduced fracture toughness (a material’s capacity to withstand further cracking). They are more expensive since they happen in very limited quantities.

Alloys of wrought aluminum

Wrought refers to a solid object that has been formed. This kind of alloy is created by rolling, forging, stamping, or extruding huge slabs or billets of molten aluminum into the desired shape.

The most often utilized material in the CNC machining of aluminum is a forged alloy. This is a result of their greater durability and mechanical qualities when compared to cast alloys. They are less difficult to wear on the edges of cutting tools, easier to manufacture, and offer better finishes on the exterior.


Due to aluminum’s characteristics and advantages, aluminum is frequently utilized in machining. Aluminum alloys machined by CNC make the process even smoother. A number of aluminum alloys used for machining and their various qualities were discussed in this article.

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