Which two alloys are commonly used in aircraft sheet metal construction?

Aluminum 2024 and Aluminum 6061 are widely recognized for their use in aircraft sheet metal construction due to their excellent strength-to-weight ratios, corrosion resistance, and suitability for welding and forming processes.

Aluminum 2024 is primarily used in aircraft structures that require high strength and fatigue resistance, making it ideal for parts exposed to significant stress, such as wing spars and fuselage components. Its high tensile strength is a key factor in its selection for critical structural applications.

Aluminum 6061, on the other hand, is known for its versatility and is often used for parts that require good corrosion resistance and weldability, such as aircraft frames and engine components. This alloy can easily be formed and machined, making it a popular choice in the manufacturing of various aircraft components.

The combination of these two alloys maximizes performance across various applications in aviation, contributing to the overall efficiency and safety of aircraft structures.