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7050 T73510 T73511 Aluminum

7050 aluminum alloy is a high-strength aluminum alloy commonly used in the aerospace field, especially suitable for applications that require high stress and corrosive environments. 7050 aluminum alloy exhibits significant performance differences in its various heat-treated states, with T73510 and T73511 being two common states.

Both 7050 T73510 and T73511 Aluminum alloys have excellent stress corrosion resistance and high strength, making them widely used in the aerospace field for structural components that meet different design requirements.

  • 7050-T73510 aluminum: The main feature is enhanced stress corrosion resistance through over-aging without straightening. It is suitable for aerospace structural components and environments requiring high strength.
  • 7050-T73511 aluminum: Compared to T73510, over-aging is more complete, and it is straightened after stretching. It is more suitable for structural components with higher shape accuracy requirements.

Comparison table of 7050-T73510 and 7050-T73511 aluminum alloys

Characteristics 7050-T73510 Aluminum Alloy 7050-T73511 Aluminum Alloy
Heat Treatment Solution heat treatment, stress relief, artificial over-aging Solution heat treatment, stress relief, over-aging
Stress Relief Stress is relieved by stretching, with the amount of stretching varying depending on the product type Stress is relieved by stretching, with the amount of stretching varying depending on the product type
Shape after Stretching Not straightened after stretching Straightened after stretching
Over-aging Degree Medium, optimized for stress corrosion resistance More extensive over-aging, optimized for stress corrosion resistance
Main Applications Suitable for aerospace structural components where shape accuracy is not highly critical, such as fuselage, wings, etc. Suitable for aerospace structural components with higher shape accuracy requirements, such as wing spars, landing gear, etc.
Stress Corrosion Resistance Excellent Superior
Usage Scenario High strength, high corrosion resistance requirements, but with lower shape precision demands High strength, high corrosion resistance requirements, and higher shape precision demands

7050-T73510 Aluminum Alloy

7050-T73510 Aluminum Alloy Heat Treatment and State

  • Solution Heat Treatment: The 7050 aluminum alloy undergoes solution heat treatment during the manufacturing process to dissolve the alloying elements and achieve a uniform distribution. This process enhances the strength and toughness of the material.
  • Stress Relief: After solution heat treatment, the aluminum undergoes a stress relief process. This process relieves internal stress by stretching the metal a certain amount, with the amount of stretching depending on the type of product being produced (e.g., extrusions or tubes).
  • Artificial Over-aging: To further stabilize the aluminum alloy, 7050-T73510 aluminum undergoes artificial over-aging. The degree of over-aging is selected to maximize stress corrosion resistance, which is especially important for aerospace structural components.

7050-T73510 Aluminum Alloy Stretching Characteristics

After the stretching operation, the aluminum is not straightened, which is different from the T73511 state. The T73510 state is particularly suitable for applications where straightening is not a critical requirement, such as certain load-bearing structural components.

7050-T73510 Aluminum Alloy Applications

7050-T73510 aluminum is mainly used for aerospace structural components, especially those requiring high strength, excellent stress corrosion resistance, and durability, such as aircraft fuselage, wings, and high-pressure components.

7050-T73511 Aluminum Alloy

7050-T73511 Aluminum Alloy Heat Treatment and State

  • Solution Heat Treatment: Like the T73510 state, 7050-T73511 aluminum also undergoes solution heat treatment to ensure uniform distribution of alloying elements and to improve material strength.
  • Stress Relief: Similarly, 7050-T73511 aluminum undergoes stress relief by stretching, with the amount of stretching adjusted based on the form of the alloy (e.g., extrusions or tubes).
  • Artificial Over-aging: Compared to T73510, 7050-T73511 aluminum undergoes more extensive over-aging, which helps further improve the alloy's stress corrosion resistance, especially under more severe environmental conditions.

7050-T73511 Aluminum Alloy Stretching Characteristics

In the T73511 state, the aluminum alloy is straightened after stretching, which is one of the main differences from the T73510 state. The straightening process makes 7050-T73511 aluminum more suitable for applications requiring higher shape accuracy.

7050-T73511 Aluminum Alloy Applications

The applications of 7050-T73511 aluminum are similar to those of T73510, but it is especially suitable for structural components that require higher shape accuracy, such as wing spars, long rod structures, and landing gear. With superior stress corrosion resistance in the T73511 state, it is suitable for use in components exposed to high stress and corrosive environments.

7050 T73510 T73511 Aluminum Mechanical Properties

Mechanical Properties
Hardness, Brinell 132 132 500 kg load with 10 mm ball. Calculated value.
Hardness, Knoop 166 166 Converted from Brinell Hardness Value
Hardness, Rockwell A 49.8 49.8 Converted from Brinell Hardness Value
Hardness, Rockwell B 80 80 Converted from Brinell Hardness Value
Hardness, Vickers 151 151 Converted from Brinell Hardness Value
Ultimate Tensile Strength 496 MPa 72000 psi AA; Typical
Tensile Yield Strength 434 MPa 63000 psi AA; Typical
Elongation at Break 12% 12% AA; Typical; 1/2 in. (12.7 mm) Diameter
Modulus of Elasticity 71.7 GPa 10400 ksi AA; Typical; Average of tension and compression. Compression modulus is about 2% greater than tensile modulus.
Poisson's Ratio 0.33 0.33
Shear Modulus 26.9 GPa 3900 ksi
Shear Strength 290 MPa 42100 psi Calculated value.

7050 T73510 T73511 Aluminum Physical Properties

Physical Properties Metric English Comments
Density 2.83 g/cc 0.102 lb/in³ AA; Typical

7050 T73510 T73511 Aluminum Electrical Properties

Electrical Properties
Electrical Resistivity 4.3e-006 ohm-cm 4.3e-006 ohm-cm

7050 T73510 T73511 Aluminum Thermal Properties

Thermal Properties
CTE, linear 20°C 23.6 µm/m-°C 13.1 µin/in-°F 20-100ºC
CTE, linear 250°C 25.4 µm/m-°C 14.1 µin/in-°F Average over the range 20-300ºC
Specific Heat Capacity 0.86 J/g-°C 0.206 BTU/lb-°F
Thermal Conductivity 155 W/m-K 1080 BTU-in/hr-ft²-°F Estimated from other heat treatments.
Melting Point 524 - 635 °C 975 - 1170 °F For homogeneous wrought material. Eutectic for nonhomogeneous wrought or as-cast material that has not been heat treated is 465ºC.
Solidus 524 °C 975 °F For homogeneous wrought material. Eutectic for nonhomogeneous wrought or as-cast material that has not been heat treated is 465ºC.
Liquidus 635 °C 1170 °F

7050 T73510 T73511 Aluminum Processing Properties

Processing Properties
Annealing Temperature 413 °C 775 °F
Solution Temperature 477 °C 890 °F
Aging Temperature 121 - 177 °C 250 - 350 °F

Chemical Composition of 7050 Aluminum Alloy

7050 alloy chemical
Chemical element % Present
Si 0.12%
Fe 0.15%
Cu 2.0-2.6%
Mn 0.1%
Mg 1.9-2.6%
Ti 0.06%
Cr 0.04%
Zr 0.08-0.15%
Zn 5.7-6.7%
Other (Each) 0.0-0.05
Aluminium (Al) Balance