Aluminum Grades for Aerospace Applications

The aluminum grade chosen will depend on the aerospace application. Machinability and corrosion resistance are some of the key factors to consider when evaluating aluminum alloys for aerospace applications.

• Alloy 2014 – A beneficial alloy choice for framework due to its strength and machinability. Should not be used in environments with high corrosive environments or environmental stressors.
• Alloy 2024 – This alloy possesses high tensile strength, is heat treatable, and stress resistant. Aluminum 2024 plate and sheet are ideal for aerospace applications involving structures, aircraft wings, and repairs.
• Alloy 3003 – This alloy possesses good weldability and corrosion resistance. It is not heat treatable but is one of the more common aluminum alloys used for aircraft and aviation applications.
• Alloy 5052 – As another aluminum alloy not suitable for heat treatment, 5052 does have a high fatigue strength compared to other aluminum alloys. It possesses good formability and corrosion resistance properties and is used commonly for fuel tanks in aircraft.
• Alloy 6061 – This alloy can be welded and brazed. It is a workable alloy with superb corrosion resistance. It is commonly used in the fuselage and wings.
• Alloy 6063 – This alloy is an excellent choice for architectural structures and anodizing requirements. High corrosion resistance and high tensile properties are some of the features of this alloy.
• Alloy 7050 – This is a great option for military aircraft and wing skins as it may be reheated and is applicable for military aircraft and wing skins. It possesses a superb strength-to-weight ratio.
• Alloy 7068 – Used extensively for aircraft applications, this alloy is one of the strongest available aluminum alloys for aerospace applications. It is a popular alloy grade for applications that involve exposure to high level environmental stressors. It possesses a high level of strength and corrosion resistance.
• Alloy 7075 – This alloy has average corrosion resistance and high fatigue resistance. It compares to the strength of steel due to the high level of zinc in its composition. It is ideal for highly stressed parts such as fuselages.