7475 T76 Aluminum

7475-T76 aluminum alloy is a high-strength aluminum alloy, belonging to the 7000 series of aluminum alloys, particularly suitable for structural components in the aerospace field, especially in applications that require high strength and corrosion resistance. The T76 temper of this alloy is achieved through solution heat treatment followed by artificial aging. This process optimizes its mechanical properties, particularly enhancing its resistance to exfoliation corrosion, making it an ideal choice for aerospace and military applications.

7475 T76 Aluminum Composition and Properties

The main alloying elements in 7475 aluminum alloy include zinc (Zn), magnesium (Mg), copper (Cu), and small amounts of other elements such as chromium, silicon, and manganese. The combination of these elements gives 7475 aluminum alloy high strength, good corrosion resistance, and moderate machinability. In the T76 temper, the alloy undergoes solution treatment followed by artificial aging, with the aim of further strengthening the material's mechanical properties while improving its corrosion resistance by controlling the aging time and temperature.

7475 T76 Aluminum Performance Characteristics

Strength: 7475-T76 aluminum alloy has extremely high tensile and yield strength, making it highly suitable for applications that require high load-bearing capacity.
Corrosion Resistance: Through aging treatment, 7475-T76 exhibits outstanding resistance to exfoliation corrosion, especially when exposed to harsh environmental conditions such as marine environments and chemical corrosion. This property makes it particularly important in aerospace and other high-corrosion environments.
Toughness and Ductility: Although this alloy excels in strength, its ductility and toughness are slightly lower compared to some other stronger aluminum alloys. Proper aging treatment can improve its toughness to some extent.
Weldability: Due to its relatively high copper content, 7475-T76 aluminum alloy has poor weldability and is generally not recommended for welding applications. Special welding techniques or preheating treatments are often required if welding is necessary.

7475 T76 Aluminum Applications

7475-T76 aluminum alloy is widely used in the aerospace field, particularly for structural components that require both high strength and corrosion resistance.

Aircraft Structural Components: Due to its high strength and corrosion resistance, 7475-T76 is used in aircraft wings, fuselage frames, skins, and other structural components.
Military Applications: In military aircraft and high-performance weapon systems, 7475-T76 is frequently used for critical load-bearing parts due to its excellent strength and corrosion resistance.
Missiles and Rockets: The strength and corrosion resistance of this alloy also make it suitable for high-performance applications such as missiles and rockets in the aerospace sector.

7475 T76 Aluminum Processing and Heat Treatment

Solution Heat Treatment: 7475 aluminum alloy is first subjected to solution heat treatment, where alloying elements are dissolved into the matrix at high temperatures to achieve optimal homogenization.
Artificial Aging: After solution treatment, the alloy undergoes artificial aging to reach the T76 temper, further enhancing its corrosion resistance and improving its exfoliation corrosion resistance.

7475 T76 Aluminum Advantages and Limitations

Advantages of 7475 T76 Aluminum

High strength, making it suitable for high-load structural components.
Excellent exfoliation corrosion resistance, particularly suited for aerospace applications.
Good fatigue strength and resistance to crack propagation.

Limitations of 7475 T76 Aluminum

Poor weldability, limiting its use in applications that require welding.
Although it is very strong, its ductility and toughness are relatively low, which may not be ideal for applications that require high formability.

7475-T76 aluminum alloy, through solution treatment and artificial aging, offers an aluminum alloy that balances high strength and corrosion resistance, making it especially suitable for aerospace applications. Despite its lower weldability and ductility, its strength and corrosion resistance in key structural components make it an ideal material in aerospace and military fields.

7475 T76 Aluminum Alloy Product Forms

Product	Description
7475 Alclad T761 Aluminum	7475 Alclad T761 aluminum is a high-strength aluminum alloy with a corrosion-resistant cladding layer, often used in aerospace applications for structural parts like aircraft fuselages and wing components. The cladding provides enhanced protection against environmental elements while maintaining the alloy's excellent strength-to-weight ratio.
7475-T76 Aluminum Sheet	7475-T76 aluminum sheet is a high-strength, heat-treated aluminum sheet used primarily in aerospace structures, such as wing skins and fuselage panels. Its T76 temper offers a balance of strength, toughness, and corrosion resistance, making it ideal for applications that require durability under demanding conditions.
7475 T76 Aluminum Plate	7475 T76 aluminum plate is a robust, high-performance alloy plate, commonly used in aerospace and defense industries for structural components like aircraft beams, spars, and fuselage parts. This alloy offers superior strength and fatigue resistance, along with excellent weldability and stress resistance.
7475 T76 Aluminum Bar	7475 T76 aluminum bar is a versatile and high-strength bar stock used in the aerospace industry for a variety of applications, such as aerospace frames, structural supports, and fittings. Its high tensile strength and durability under stress make it well-suited for critical structural components.
7475 T76 Aluminum Profiles (including Angle, T-shaped, U-shaped profiles, etc.)	7475 T76 aluminum profiles, including angle, T-shaped, and U-shaped profiles, are used in the construction of aerospace structures, providing robust and lightweight solutions for components like frames, support beams, and brackets. These profiles maintain the high-strength characteristics of 7475 T76 aluminum while offering versatile shapes for different structural requirements.
7475 T76 Aluminum Tubing	7475 T76 aluminum tubing is used in aerospace applications that require high-strength, lightweight, and corrosion-resistant tubing. Its applications include fuel lines, hydraulic systems, and structural tubing where strength and weight reduction are critical. The alloy's excellent strength-to-weight ratio ensures its effectiveness in these demanding applications.
7475 T76 Aluminum Extruded Profiles	7475 T76 aluminum extruded profiles are custom-shaped sections produced through extrusion, commonly used in aerospace and structural applications. These profiles can be tailored to meet specific design requirements and are ideal for lightweight structural components that demand high strength and corrosion resistance, such as wing spars, fuselage frames, and support structures.