7049 T7352 Aluminum

7049-T7352 aluminum alloy is a high-strength alloy that undergoes special heat treatment and aging processes, offering excellent mechanical properties, corrosion resistance, and high-temperature stability. It is commonly used in aerospace and other high-performance structural applications.

Compared to the T73 state, 7049-T7352 aluminum alloy further improves material stability, corrosion resistance, and fatigue life, making it suitable for more demanding operating environments, especially in high-temperature and high-humidity conditions, where it performs better.

7050-T7352 aluminum is the T7352 state of 7049 aluminum. To achieve this state, the metal undergoes solution heat treatment to relieve stress, followed by artificial aging to stabilize it. Stress relief is achieved by compressing the metal by 1-5%. The degree of aging is selected to maximize stress corrosion resistance.

7049-T7352 Aluminum Alloy Composition and Properties

• Alloy Type: 7049 aluminum alloy is part of the aluminum-zinc-magnesium series, offering very high strength and corrosion resistance, commonly used in aerospace. Its main alloying elements are aluminum, zinc, magnesium, and small amounts of copper.
• Strength: 7049-T7352 has extremely high tensile and yield strength, making it suitable for structural applications under heavy loads.
• Density: Approximately 2.78 g/cm³.

T7352 is a state obtained by further processing the T73 state, typically through extended aging. Alloys in the T7352 state have better stability and corrosion resistance, especially in high-temperature environments, where they show superior resistance to stress corrosion cracking.

The hardness and strength of T7352 are slightly lower than those of T73, but it has a longer fatigue life and better performance in low-temperature environments.

7049-T7352 Aluminum Performance Characteristics

• High Stability: Compared to the T73 state, T7352 alloy has better chemical stability, making it suitable for applications requiring long-term use and resistance to temperature fluctuations.
• Excellent Corrosion Resistance: Especially in high-humidity, high-temperature, and salt-spray environments, T7352 alloy's corrosion resistance far exceeds that of other aluminum alloys, effectively reducing the likelihood of corrosion in harsh environments.
• Stress Corrosion Cracking Resistance: T7352 alloy is particularly suitable for aerospace structural components that require extremely high resistance to stress corrosion cracking.
• High Fatigue Life: The heat treatment process of T7352 gives it superior fatigue strength and durability compared to T73.

7049-T7352 Aluminum Applications

• High-Temperature Environments: 7049-T7352 aluminum alloy maintains high strength and stability even at elevated temperatures (around 150°C), making it widely used in aircraft engines, fuselage frames, and high-temperature operating machinery.
• High-Humidity Environments: Its corrosion resistance in humid conditions makes it more reliable in such applications. It is commonly used in aircraft, ship structures, and other high-strength components exposed to moisture or marine environments.
• Aerospace: Due to its excellent mechanical properties and corrosion resistance, 7049-T7352 is widely used in aerospace structural components, wing spars, landing gear structures, and other high-strength parts.
• Automotive and Transportation: It is also used in high-strength, corrosion-resistant automotive parts, particularly in high-performance racing cars and transportation vehicles exposed to harsh environments for extended periods.

T7352 State 7049 Aluminum Processing

• Solution Heat Treatment: The alloy is first subjected to solution heat treatment, typically at around 500°C, to ensure uniform distribution of alloying elements and enhance the mechanical properties of the aluminum alloy.
• Stress Relief: After solution treatment, the aluminum alloy is compressed by 1-5% to relieve internal stresses generated during the manufacturing process. This helps minimize deformation and cracking that may occur after heat treatment.
• Artificial Aging: After compression, the aluminum alloy undergoes artificial aging, further stabilizing the material, particularly enhancing its stress corrosion cracking (SCC) and fatigue resistance.

7049-T7352 Aluminum Machining and Welding

• Welding Performance: Although 7049-T7352 aluminum alloy has very high strength, its weldability is relatively poor. Special welding methods, such as TIG or MIG welding, are required, and post-welding heat treatment may be necessary to restore its properties.
• Machining: The alloy can be processed using conventional machining methods (such as milling and turning), but due to its high hardness, cutting tools may need to have higher strength and wear resistance.

In the T7352 state, 7049-T7352 aluminum alloy, after solution heat treatment and artificial aging, significantly improves its stability, corrosion resistance, and fatigue performance. It is especially suitable for aerospace, military, and high-performance transportation vehicles operating in high-temperature, high-humidity, and high-load environments.

Comparison of 7049-T73 Aluminum and 7049-T7352 Aluminum