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7050 T7451 Aluminum Plate

The 7050 T7451 aluminum plate is a specially treated high-strength aluminum alloy, belonging to the 7050 series. This alloy is mainly used in applications requiring excellent strength and corrosion resistance, particularly in aerospace and other high-performance structures.

Comparative Advantages of 7050-T7451 Aluminum Plate

Property Description
Strength One of the strongest aluminum alloys, second only to other temper-specific 7050 variants like T7651.
Corrosion Resistance Enhanced SCC and exfoliation corrosion resistance compared to other high-strength aluminum alloys.
Machinability Excellent machinability with minimal distortion due to stress relief processing.
Weight High strength-to-weight ratio, making it a preferred material for aerospace and defense applications.

What is 7050 T7451 material?

7050 T7451 aluminum is a high-performance aerospace-grade aluminum alloy in the T7451 temper. This temper is achieved through specific processes, including solution heat treatment, stress relief, and artificial over-aging stabilization. These processes optimize the material's mechanical properties, making it suitable for applications requiring a balance of strength, corrosion resistance, and toughness.

7050-t7451 aluminum properties

High Strength

Among the 7050 aluminum variants, T7451 offers the second-highest strength.

Its strength is optimized through precise heat treatment and stress relief processes, enabling it to withstand heavy structural loads.

Excellent Corrosion Resistance

The artificial overaging in the T7451 state enhances resistance to stress corrosion cracking (SCC) and exfoliation corrosion.

This makes it ideal for environments with high humidity or exposure to saltwater.

Balanced Toughness

The T7451 temper provides improved fracture toughness, essential for critical aerospace and defense applications.

This balance of strength and toughness ensures durability under complex loading conditions.

Stress Relief Processing

The stress relief is achieved by stretching the material post-heat treatment.

This step minimizes residual stresses, reducing risks of warping during machining or service.

Dimensional Stability

Due to its low residual stress, the plate exhibits excellent dimensional stability after machining, making it ideal for precision manufacturing.

Machinability

The 7050-T7451 aluminum plate maintains good machinability after heat treatment, making it suitable for mechanical processing and forming.

Processing and Manufacturing of 7050-T7451 Aluminum Plate

Solution Heat Treatment:

The alloy is heated to dissolve alloying elements like zinc, copper, and magnesium uniformly in the aluminum matrix, enhancing mechanical properties.

Stress Relief:

The material undergoes controlled stretching to eliminate internal stresses, ensuring stability during machining.

Artificial Overaging (T7451):

The plate is aged under controlled conditions to achieve an optimal balance of tensile strength, corrosion resistance, and toughness.

Applications of 7050-T7451 Aluminum Plate

Aerospace Structures

Used in wing spars, fuselage frames, and landing gear components due to its lightweight yet strong characteristics.

Ideal for high-stress structural components where weight reduction is critical.

Defense and Military Equipment

Key material in manufacturing missile systems, armor plating, and aircraft structural components due to its toughness and corrosion resistance.

High-Performance Industrial Applications

Applied in precision tools, heavy-duty machinery parts, and molds where high strength and stability are required.

The 7050-T7451 aluminum plate is a high-performance aluminum alloy material that has undergone fine processing, making it suitable for applications requiring strength and corrosion resistance. Its special treatment process achieves a good balance between strength, toughness, and corrosion resistance.

Chemical Composition of 7050-T7451 Aluminum

Component Wt. %
Al 87.3 - 90.3
Cr Max 0.04
Cu 2 - 2.6
Fe Max 0.15
Mg 1.9 - 2.6
Mn Max 0.1
Other, each Max 0.05
Other, total Max 0.15
Si Max 0.12
Ti Max 0.06
Zn 5.7 - 6.7
Zr 0.08 - 0.15

Aluminum 7050-T7451 - ASM Material Data Sheet

Physical Properties Metric English Comments
Density 2.83 g/cc 0.102 lb/in³ AA; Typical
Aluminum 7050-T7451 Mechanical Properties
Hardness, Brinell 140 140 500 kg load with 10 mm ball. Calculated value.
Hardness, Knoop 177 177 Converted from Brinell Hardness Value
Hardness, Rockwell A 51.6 51.6 Converted from Brinell Hardness Value
Hardness, Rockwell B 84 84 Converted from Brinell Hardness Value
Hardness, Vickers 162 162 Converted from Brinell Hardness Value
Ultimate Tensile Strength 524 MPa 76000 psi AA; Typical
Tensile Yield Strength 469 MPa 68000 psi AA; Typical
Elongation at Break 11 % 11 % 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
Fracture Toughness 28 MPa-m½ 25.5 ksi-in½ K(IC) in S-L Direction
Fracture Toughness 31 MPa-m½ 28.2 ksi-in½ K(IC) in T-L Direction
Fracture Toughness 35 MPa-m½ 31.9 ksi-in½ K(IC) in L-T Direction
Shear Modulus 26.9 GPa 3900 ksi
Shear Strength 303 MPa 44000 psi AA; Typical
Aluminum 7050-T7451 Electrical Properties
Electrical Resistivity 4.3e-006 ohm-cm 4.3e-006 ohm-cm
Aluminum 7050-T7451 Thermal Properties
CTE, linear 68°F 23 µm/m-°C 12.8 µin/in-°F AA; Typical; Average over 68-212°F range.
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 157 W/m-K 1090 BTU-in/hr-ft²-°F
Melting Point 488 - 629 °C 910 - 1165 °F AA; Typical range based on typical composition for wrought products 1/4 inch thickness or greater
Solidus 488 °C 910 °F AA; Typical
Liquidus 629 °C 1165 °F AA; Typical
Aluminum 7050-T7451 Processing Properties
Annealing Temperature 413 °C 775 °F
Solution Temperature 477 °C 890 °F
Aging Temperature 121 - 177 °C 250 - 350 °F