The most commonly used grades for high-strength aluminium alloys are 7050 and 7075. While they are often compared side by side, only some truly understand these two alloys’ differences. As an expert in the field, I highlight the key differences between aluminium 7050 and 7075 and help you understand which is right for your application.
Difference Between Aluminium 7050 and Aluminium 7075
The primary difference between aluminium 7050 and 7075 is their chemical composition. Aluminium 7075 comprises zinc as the main alloying element, while aluminium 7050 includes zinc, magnesium, and copper. These alloying elements give each grade unique properties, making them suitable for different applications.
Strength and Toughness:
7050 and 7075 are high-strength alloys, but 7075 is generally considered stronger. However, 7050 has better toughness and fatigue resistance, making it a great choice for applications that require high stress, such as aircraft structures and bike frames.
Weldability refers to an alloy’s ability to be joined or repaired using welding techniques. While aluminium 7075 has poor weldability due to its high copper content, aluminium 7050 can be welded using standard techniques. This makes 7050 a better choice for welding applications, such as boat building or automotive parts.
Cost is always a factor when selecting any material. Aluminium 7075 is more expensive than 7050 due to its higher strength and other unique properties. However, the specific cost differential can vary based on factors such as the volume required, the supplier, and the application.
As mentioned earlier, both 7050 and 7075 find widespread use in various applications. Aluminium 7075 is often used in aircraft structures, bike frames, marine applications, and manufacturing guns and other weapons. Aluminium 7050, on the other hand, is used in aircraft fuselage frames, helicopter rotor components, and spacecraft structures. It is also commonly used in high-performance sporting goods like hockey sticks and baseball bats.
In summary, while aluminium 7050 and 7075 may seem interchangeable on the surface, they have different properties that make each suitable for unique applications. Choosing between the two will depend on various factors, including the specific application, required strength, weldability needs, and budget. As an expert in the field, I hope this guide has helped you understand the differences between aluminium 7050 and 7075 and how to select the right alloy for your needs.
A passionate metal industry expert and blogger. With over 5 years of experience in the field, Palak brings a wealth of knowledge and insight to her writing. Whether discussing the latest trends in the metal industry or sharing tips, she is dedicated to helping others succeed in the metal industry.