Aerospace Grade Aluminum 7075-T6: Properties and Applications 

A popular and versatile material used in the aerospace sector is aluminum 7075-T6. The alloy is valued for its high durability, low weight, and ability to resist corrosion.

If you’re looking to learn more about metal, this simple guide is for you. We explore its properties, applications, and much more. Now let’s read on.

What is 7075-T6 Aluminum?

7075-T6 aluminum is a unique and popular metal appreciated for its high strength and low weight, and is commonly used in the aerospace industry.

It consists of zinc as the key constituent, together with other materials such as copper, titanium, and magnesium.

Due to its lightweight and hardness, it is typically used in the production of various aircraft parts. It has excellent ability to withstand corrosion and is thus applicable for use in extreme climatic conditions.

Beyond that, it can be easily machined and welded, and it aligns with many surface treatment techniques, making it suitable for both complex and straightforward geometries’ part production.

The T6 in 7075-T6 aluminum indicates that the material undergoes a thermal conditioning procedure, which makes it even harder. As a result, the material can resist many loads and pressures without bending or deforming.

Aluminum 7075-T6 Mechanical Properties Table

Properties	Values
Yield Tensile Strength	503MPa
Ultimate Tensile Strength	572MPa
Tensile Modulus	72GPa
Shear Strength	331MPa
Shear Modulus	26GPa
Fatigue Strength	159MPa
Elongation at Break	11%
Poissons Ratio	0.32
Hardness	B87/150
Density	2.8 g/cm³

Aluminum 7075-T6 Electrical/Magnetic Properties Table

Properties	Values
Surface Resistance (ANSI)	5.0µΩ
Magnetism	Non-magnetic

Aluminum 7075-T6 Thermal Properties Table

Properties	Values
Thermal Expansion Coefficient	21.6µm/(m⋅°C)
Specific Heat Capacity	0.960 J/g°C
Thermal Conductivity	130 W/(m⋅°C)
Melting Point	447°C

Aluminum 7075-T6 Chemical Properties Table

Properties	Range
Corrosion Resistance	Moderate

Benefits of Aluminum 7075-T6

Below are some reasons why the alloy is advantageous in the aerospace field:

High Strength

7075-T6 has an excellent tensile strength of 83,000psi. With this, it is among the strongest aluminum alloys and thus can be utilized in highly demanding applications without deforming or losing its durability feature.

Lightweight

The material is also known for its lightweight. It has a low density of about 2.81g/cm³. Despite its low weight, it is strong, making it suitable for aircraft use where both durability and lightweight design are essential.

Corrosion Resistance

Aircraft fly in demanding and non-conducive environments involving high heat and humidity. With this, 7075-T6 is suitable for manufacturing aircraft parts, which withstand harsh situations and remain durable throughout their service life. The addition of zinc to the alloy also enhances its corrosion resistance.

Machinability

It also exhibits unique mechanical properties and a Brinell hardness of approximately 150 HB. This makes it easily machinable and thus applicable for producing components with intricate geometries and precision.

Welding Worthiness

Welding this alloy can be challenging, though it can be achieved using the proper techniques. Its elongation at break property is also estimated at 11% which also explains why it’s applicable for welding.

Hardness

Aluminum 7075-T6 is very hard, and this is one reason why it can resist a lot of load and pressure without deforming.

Aerospace Applications of Aluminum 7075-T6

The aircraft sector requires alloys with exceptional strength, the ability to withstand corrosion, and a lightweight design. Aluminum 7075-T6 possesses these key qualities and more, which enable engineers to use it in the production of aircraft components, such as wings, fuselage frames, landing gear units, propeller hubs, and engine mount structures.

Applications Across Other Industries

Apart from the aerospace field, metal is also used in many fields, such as the following:

Automotive

The automotive sector also values durable yet lightweight metals; as such, this aluminum alloy is valuable in creating automotive devices, such as chassis systems, engine components, and wheels.

Defense

It is valuable in producing defense tools and machines, such as artillery parts, armor plating, and military vehicles.

Sports Equipment

Additionally, due to its durability and lightweight nature, it is utilized in the production of sports equipment, including baseball bats, bicycle frames, archery bows, hockey sticks, and rock climbing gear.

Marine

The alloy has a remarkable ability to withstand corrosion, and thus it is vital in marine operations where there is constant exposure to unfavorable climatic factors. The metal is valuable in creating yacht and boat fittings, boat hulls, propeller hubs, masts, and other components.

Conclusion

Aluminum 7075-T6 is an exceptional metal valued not only in the aerospace sector but also in many other fields due to its exceptional characteristics.

At AeroCNCParts, we specialize in machining precise aerospace parts using different materials, including aluminum 7075-T6. With more than 20 years of aerospace experience, we deliver AS9100 and NADCAP-certified components. Our processes follow 100% inspection and full material traceability, ensuring that all parts meet industry standards. Contact us now.

FAQs

How strong is 7075 T6 aluminum?

It is among the strongest alloys available, with a tensile strength of 83,000 psi. As such, it is comparable to many steels.

Can 7075-T6 aluminum be anodized for additional protection?

Yes, it can be anodized to provide additional protection and enhance its resistance to wear and corrosion.

How does 7075 T6 compare to other aluminum alloys?

It is classified among the most rigid and durable aluminum available. Its special high strength and low weight also differentiate it from others.

Is 7075 T6 aluminum suitable for high-temperature applications?

It maintains its hardness at room temperature. At extremely high temperatures, it could lose its qualities, including its strength. As such, you might need to check your usage requirements.

Are there any limitations to the applications of 7075 T6 aluminum?

It is relatively more expensive than many aluminum alloys despite its exceptional properties.

Can 7075 T6 aluminum be joined using traditional welding techniques?

7075-T6 aluminum has high strength and, as such, requires more sophisticated welding procedures and techniques to be welded.