Aluminium 2024 vs 7075 – What’s the Difference

Aluminium 2024 vs 7075

When selecting the right type of aluminium alloy for your project, there are many things to consider. One big decision is choosing between Aluminium 2024 and 7075. Both of these alloys are commonly used in aerospace and other high-stress applications, but they have some important differences that could make one a better fit for your project than the other. In this blog post, we’ll look closer at Aluminium 2024 vs 7075 and help you determine which is right for you.

What is Aluminium 2024?

Aluminium 2024 is an alloy composed primarily of aluminium, copper and magnesium. It offers excellent strength and fatigue resistance, making it a great choice for high-stress environments. Its lightweight and corrosion resistance is ideal for aircraft components like fuselages and wings. Due to its low cost and good machinability, its superior mechanical properties make it suitable for other applications, such as structural components in automobiles, marine applications, or bridges.

What is Aluminium 7075?

Aluminium 7075 is a specialized type of aluminium alloy famous for its high strength-to-weight ratio. It is one of the most powerful and lightest metals known. It is desirable for aerospace applications such as aircraft frames, other parts, sporting equipment, and ornamental products. Additionally, it has excellent corrosion resistance properties, making it suitable for saltwater applications. Aluminium 7075 has superior mechanical properties to many other aluminium alloys and is, therefore, a great option for designers demanding high strength without sacrificing integrity or weight.

Difference Between Aluminium 2024 and 7075

Aluminum 2024 is an alloy of copper, manganese, and magnesium whereas Aluminum 7075 contains zinc as its major alloying agent. The former is less dense and has higher fatigue strength, improved corrosion resistance, better weldability and higher tensile strength than the latter. The main difference between 2024 and 7075 lies in their ultimate tensile strengths (UTS) – 2024 has a UTS of 480 MPa while for 7075 it’s 540 MPa.

Alloy Composition

Aluminium 2024 and 7075 are the most popular alloys used for various applications. The primary difference between these two alloys is their composition; Aluminium 2024 is composed primarily of copper, while Aluminium 7075 is composed primarily of zinc. Both alloys also contain small amounts of magnesium and other elements.

Strength & Ductility

Aluminium 2024 is known for its excellent strength-to-weight ratio and flexibility, making it a great choice for applications requiring strength and flexibility. Aluminium 7075 is even stronger than 2024 but is not as malleable, so it may not be suitable for certain applications requiring flexibility.

Corrosion Resistance

Aluminium 2024 and 7075 have good corrosion resistance compared to other aluminium alloys. However, Aluminium 2024 has slightly better corrosion resistance due to its higher copper content, which helps to protect the alloy from corrosion in certain environments.

Temperature Resistance

Aluminium 2024 has good temperature resistance up to about 200°C (392°F), while Aluminium 7075 can withstand temperatures up to about 250°C (482°F). This makes Aluminium 7075 a better choice for applications that require higher temperature resistance than what Aluminium 2024 can provide.


Aluminium 2024 tends to be more expensive than Aluminium 7075 due to its higher copper content and lower availability on the market. Additionally, since Aluminium 7075 is stronger than 2024, less material may be required to achieve the same level of strength, which can help reduce costs in certain applications.


In summary, Aluminium 2024 and 7075 are excellent choices for high-stress applications, but they have some important differences that can impact their performance in certain situations. Aluminium 7075 is stronger and lighter than 2024, making it a good choice for weight-sensitive applications. However, Aluminium 2024 has a higher fatigue resistance and is easier to machine, making it a better choice for certain applications. Understanding these differences can help you make an informed decision about which alloy to use for your project.



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