Aluminum 2014

CNC Machining Aluminum 2014

Aluminum 2014 is a strong alloy widely used in aerospace. It’s easily machinable in specific conditions and often formed into bars and profiles through extrusion.

It is a heat-treatable, high-strength material commonly used in CNC machining. Aluminum 2014 produces small, manageable chips during machining, easing chip evacuation. It responds well to heat treatment processes, with solution heat treatment followed by quenching and aging commonly employed to enhance its mechanical properties. However, its corrosion resistance is not as high as some other aluminum alloys, and precautions are needed during welding due to its copper content. For CNC machining, carbide tools are recommended, and proper cooling is important to dissipate heat and extend tool life. Optimal cutting speeds, feeds, and depths of cut, tailored to the specific machining operation, contribute to achieving high-quality surface finishes.

Aluminum makes up the majority of its composition. Copper is its primary alloying element, ranging from 3.9% to 5%. It has minor amounts of other elements such as the following: chromium not exceeding 0.1%, iron is limited to a maximum of 0.7%, magnesium between 0.2% and 0.8%, manganese spanning from 0.4% to 1.2%, silicon varying from 0.5% to 1.2%, titanium not surpassing 0.15%, and zinc capped at 0.25%. Additionally, each remaining element is limited to a maximum of 0.05%, and the total sum of all remaining elements combined is restricted to 0.15%. The combined percentage of titanium and zinc is set at a maximum of 0.2%.

What is Aluminum 2014?

2014 aluminum alloy is widely used in the aerospace industry due to its strength and hardness. Before 1954, it was known by the industry designation “14S” before adopting The Aluminum Association alloy designations. It is easily machinable in certain conditions but challenging to weld as it tends to crack. Among the 2000-series aluminum alloys, it is the second most popular after 2024.

This alloy is commonly extruded and forged but has poor corrosion resistance. To address this issue, it is often coated with pure aluminum. If left uncoated and exposed to the elements, it is recommended to be painted for corrosion protection.