7175-T74 Aluminum vs. 7175-T7452 Aluminum

7175-T74 aluminum is suitable for applications requiring higher ductility and fatigue strength, while 7175-T7452 aluminum performs better in terms of stress corrosion resistance, crack resistance, and shear strength.

The main difference between 7175-T74 Aluminum and 7175-T7452 Aluminum lies in their heat treatment processes and the resulting performance characteristics. While they are similar in tensile strength and overall mechanical properties, their advantages may differ in specific applications.

7175-T74 Aluminum and 7175-T7452 Aluminum Heat Treatment and Aging Process

• 7175-T74: This material undergoes solution heat treatment followed by artificial aging to stabilize its properties. The aim is to balance tensile strength, stress corrosion resistance, exfoliation corrosion resistance, and fracture toughness. Its degree of aging allows this alloy to excel in certain mechanical properties, particularly in ductility and fatigue strength.
• 7175-T7452: It also undergoes solution heat treatment, followed by a similar artificial aging process to relieve stresses. The difference lies in its manufacturing process, which includes compressing the metal (typically by 1-5%) to help eliminate internal stresses, improving its stress corrosion resistance and toughness.

7175-T74 Aluminum and 7175-T7452 Aluminum Ductility and Elongation at Fracture

• 7175-T74: This material has a higher elongation at fracture, meaning it can undergo more deformation before breaking, making it suitable for applications requiring higher ductility, especially in high-strain environments.
• 7175-T7452: Compared to T74, T7452 has slightly lower ductility. While its elongation at fracture is smaller, its performance in fatigue strength and stress corrosion resistance remains more stable, making it suitable for applications with higher long-term load and crack resistance requirements.

7175-T74 Aluminum and 7175-T7452 Aluminum Fatigue Strength

• 7175-T74: The T74 state aluminum alloy exhibits high fatigue strength, making it suitable for applications subject to repetitive stresses or vibrations, such as components in aerospace structures that frequently experience alternating loads. Its excellent fatigue performance makes it an ideal choice for components subjected to long-term pressure or mechanical fatigue.
• 7175-T7452: While T7452 has slightly lower fatigue strength, it still performs well, particularly in stress corrosion environments, where it maintains better stability and crack resistance.

7175-T74 Aluminum and 7175-T7452 Aluminum Tensile Strength and Yield Strength

• 7175-T74: This material has higher tensile strength and yield strength, making it excellent for applications that require high tensile strength, particularly in scenarios demanding high-strength structural components.
• 7175-T7452: T7452 has slightly lower yield strength compared to T74, but it still has good tensile strength. Due to its stability under long-term loads, T7452 has advantages in applications requiring stress corrosion resistance and crack resistance.

7175-T74 Aluminum and 7175-T7452 Aluminum Shear Strength

• 7175-T74: T74 has slightly lower shear strength than T7452, making it potentially less suitable for applications involving larger shear forces.
• 7175-T7452: Due to its higher shear strength, T7452 may perform better in environments subject to shear forces, making it suitable for structural applications where higher shear resistance is required, such as load-bearing components in aerospace structures.

7175-T74 is better suited for applications requiring higher elongation, fatigue strength, and excellent fracture toughness. Its design is focused on maximizing performance under complex loads, particularly in response to high strain and repeated loads. On the other hand, 7175-T7452 excels in high-strength corrosion environments, offering better stress corrosion resistance and shear strength, making it ideal for high-strength structural components that need fatigue, crack, and stability resistance. The choice between the two materials depends on the specific application requirements and operating environment.

7175-T74 Aluminum and 7175-T7452 Aluminum Performance Data Sheet