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Aluminium 6065 Alloy – Composition, Properties and Uses

Aluminium 6065

Aluminium 6065 is an alloy that is made up of aluminum, magnesium and silicon. It is a medium-strength alloy with excellent corrosion resistance and good weldability. Aluminum 6065 has great machinability and heat treatment properties, making it a popular choice for many industrial applications. This blog post will explore the uses, corrosion resistance, heat resistance, heat treatment, and machining capabilities of aluminum 6065

6065 Alloy Composition

Component Elements Properties Metric English Comments
Aluminum, Al 94.4 – 98.15 % 94.4 – 98.15 % As Balance
Bismuth, Bi 0.50 – 1.5 % 0.50 – 1.5 %
Chromium, Cr <= 0.15 % <= 0.15 %
Copper, Cu 0.15 – 0.40 % 0.15 – 0.40 %
Iron, Fe <= 0.70 % <= 0.70 %
Lead, Pb <= 0.05 % <= 0.05 %
Magnesium, Mg 0.80 – 1.2 % 0.80 – 1.2 %
Manganese, Mn <= 0.15 % <= 0.15 %
Other, each <= 0.05 % <= 0.05 %
Other, total <= 0.15 % <= 0.15 %
Silicon, Si 0.40 – 0.80 % 0.40 – 0.80 %
Titanium, Ti <= 0.10 % <= 0.10 %
Zinc, Zn <= 0.25 % <= 0.25 %
Zirconium, Zr <= 0.15 % <= 0.15 %

6065 Alloy Physical Properties

Physical Properties Metric English Comments
Density 2.72 g/cc 0.0983 lb/in³ AA

6065 Alloy Mechanical Properties

Aluminum 6065 is an excellent choice for mechanical applications due to its superior strength and durability. This popular alloy is composed of magnesium, silicon, and iron elements that combine to create a material with a great strength-to-weight ratio, making it particularly useful in many applications where weight is an important factor. Additionally, aluminum 6065 exhibits good toughness even at low temperatures, making it highly resilient to impacts and other extreme weather conditions. Furthermore, its natural curvature resistance makes it the ideal alloy for pressure vessels and storage tanks. For these reasons and more, aluminum 6065 continues to be the go-to choice for many applications requiring reliable mechanical properties.

6065 Alloy Uses

Aluminium 6065 is commonly used in aircraft components due to its high strength-to-weight ratio. This makes it an ideal choice for aircraft frames, fuselages and wings where weight savings are important considerations. It is also used in the automotive industry for engine parts such as pistons and cylinder heads and other components like suspension arms and steering knuckles. Finally, aluminum 6065 is sometimes used in the production of musical instruments such as drums and guitars because it has great acoustic properties when formed into thin sheets or plates.

Corrosion Resistance

Aluminium 6065 offers excellent corrosion resistance due to its high levels of magnesium content, which helps to form a protective oxide layer on the surface of the material when exposed to air or moisture. This oxide layer helps to protect against further oxidation, which can cause damage over time. The addition of silicon also helps aluminum 6065 resist rusting even in harsh environments such as salty sea air or near industrial facilities that produce corrosive materials like sulphur dioxide or ammonia gas.

Heat Resistance

Aluminium 6060 can withstand temperatures up to 350 degrees Celsius without experiencing any damage or deformation, which makes it suitable for use in applications requiring high temperatures, such as ovens or furnaces. Its excellent heat resistance also makes it suitable for use in engines where temperatures can reach up to 600 degrees Celsius during operation, but it will not cause any significant deterioration over time like some other metals would suffer from exposure at these extreme temperatures.

Heat Treatment Aluminium 6060 Heat-treating aluminium alloys require precise control over temperature, quench rate and cooling rate to ensure desired mechanical properties are achieved while avoiding cracking or warping due to thermal shock or stress relief during cooling cycles. The good news with aluminium alloys like Al6060 is that they are relatively easy to heat treat compared with other metals, so this process can be done quickly with minimal risk of defect during production runs if proper procedures are followed correctly by experienced personnel who understand how best to work with this material type correctly.


Machining aluminum alloys can be tricky because they tend to be more brittle than other metal types, so extra care must be taken when cutting them into shape using either conventional cutting tools like drills, saws and lathes or CNC milling machines, depending on your production requirements. Proper lubrication must be used throughout the machining process. Otherwise, chips may form on the surface causing excessive wear on cutting tools which could lead to poor component quality over time if not properly managed throughout production runs.


Welding aluminum alloys require special attention due to their tendency to crack easily when exposed to too much heat during welding operations, so proper preparation must be done prior to welding activities begin, including preheating the workpiece area before applying any filler materials onto the joint surfaces otherwise cracks may form prematurely while cooling down after welding cycle has been completed successfully.


As you can see, aluminium alloy 6065 has many great qualities that make it an attractive option for many industries, including aerospace, automotive and manufacturing, among others who need reliable parts that are lightweight yet strong enough to withstand harsh conditions while still providing superior performance overall compared with other metal types available today! Its excellent corrosion resistance, combined with its ability to handle high temperatures, along with its ease of machining, make it an ideal choice for many applications requiring dependable components built from strong yet lightweight materials! With proper care taken during fabrication processes such as heat treating, machining and welding then, there’s no doubt aluminium alloy 6065 can serve your needs perfectly!

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