Aluminum 7050

Aluminum alloy 7050, commonly used in aerospace, is suitable for CNC machining but requires careful consideration. A stable CNC machine is important to minimize vibrations, and securing the workpiece prevents unintended movement during machining.

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Precision aluminum 7050 CNC machined fixture part on dark worktable

EN AW-7050
3.4144
AlZn6CuMgZr
A97050

470-530 MPa

Ultimate Tensile Strength
390-460 MPa

Yield Strength
70-80 GPa

Young's Modulus(Elasticity)
5-12 %

Elongation at Break

At a Glance

Material Type
Metal
Material Name
Aluminum 7050
Alternative Names
EN AW-7050 | 3.4144| AlZn6CuMgZr | A97050
Process Compatibility
CNC Milling, CNC Turning

Properties Table of Aluminum 7050

Properties

Ultimate Tensile Strength 470-530 MPa
Yield Strength 390-460 MPa
Young's Modulus(Elasticity) 70-80 GPa
Elongation at Break 5-12 %
Physical Properties
Corrosion Resistance Good
Magnetism Non-magnetic
Weldability Poor
Thermal Properties
Thermal Expansion Coefficient 23-25.4 x 10^-6/°C
Thermal Conductivity 153 W/(m·°C)
Electrical Properties
Electrical Resistivity 4.4 μΩ*cm

Applications of Aluminum 7050

Aircraft structural components (wing spars, fuselage frames, bulkheads)
Components in high-performance or racing cars (chassis, structural parts)
Boat construction components
High-strength structural components
Precision machining and tooling equipment parts
High-performance machinery components

Advantages of Aluminum 7050

Excellent strength-to-weight ratio.
Suitable for environments with moisture or corrosive elements.
Good resistance to fatigue, preventing failure over time.
Generally weldable for fabricating complex structures.
Good machinability in the heat-treated condition.
Exhibits high damage tolerance, suitable for impact and mechanical stress.
Allows for various heat treatment processes to enhance mechanical properties.
Widely used in aerospace for structural components.

Raw Stock

CNC Machined

Finished Parts

Aluminum 7050 — Machining Notes

is Aluminum 7050?

What is Aluminum 7050?

Aluminum 7050 is a widely used alloy in the aerospace industry. It can be heat treated, offering high toughness, strong mechanical strength, and good resistance to stress corrosion cracking. It is part of the 7000 series and is composed mainly of aluminum, zinc, and a small amount of copper.

The alloy can undergo heat treatment processes like solution heat treatment and artificial aging to enhance its mechanical properties further. Though not as easily machinable as some other alloys, it remains suitable for standard machining methods. The ability to tailor its properties through heat treatment adds versatility, allowing it to meet specific requirements in various engineering applications.

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FAQ

How strong is 7050 aluminum?

7050 aluminum is known for its high strength-to-weight ratio. It is one of the strongest aluminum alloys, with a tensile strength of around 470-530 MPa. This makes it suitable for applications requiring strength and light weight.

Why can't you weld 7075 aluminum?

After welding, aluminum alloys like 2024 and 7075 may face stress corrosion cracking, which is not immediately detectable but can become a concern later during the component's service.

What are the tempers of 7050 aluminum?

7050 aluminum is available in various tempers, which affect its mechanical properties. Common tempers for 7050 aluminum include T7451 and T7651. T7651 offers the highest strength with good exfoliation corrosion resistance and average SCC (Stress Corrosion Cracking) resistance, while T7451 (formerly T73651) provides better SCC resistance and excellent exfoliation resistance at slightly lower strength levels.