7049-T73 Aluminum
7049 T73 aluminum alloy is a material with high strength and excellent corrosion resistance, particularly suitable for high-strength structural components in aerospace and military applications. This aluminum alloy undergoes a precise heat treatment process, and in the T73 temper, it demonstrates outstanding performance in high-stress environments.
7049-T73 aluminum is the 7049 aluminum in the T73 temper. To achieve this state, the metal undergoes solution heat treatment followed by artificial over-aging stabilization. The degree of over-aging is selected to maximize stress corrosion resistance.
Alloy Composition: The main elements of 7049 aluminum alloy include aluminum (base), zinc (Zn), magnesium (Mg), copper (Cu), chromium (Cr), and others. Its chemical composition provides it with high strength and good corrosion resistance.
7049 T73 Aluminum Processing
To achieve the T73 temper, the 7049 aluminum alloy first undergoes solution heat treatment, which fully dissolves the alloying elements at high temperatures. This process eliminates internal stresses within the aluminum alloy, ensuring stable structure and performance during subsequent processing. Afterward, the metal undergoes artificial over-aging treatment, which is the key step in producing T73 aluminum alloy. The purpose of over-aging is to further enhance the alloy's performance, particularly its resistance to stress corrosion. This process, through precise control of temperature and time, helps form a stable metal microstructure, thereby optimizing fatigue resistance and corrosion resistance.
T73 is an alloy condition obtained through a specific heat treatment process (solution heat treatment + natural aging). The main characteristic of the T73 condition is that it provides superior stress corrosion cracking (SCC) resistance compared to the T6 temper, making it suitable for long-term service structural applications.
7049-T73 Aluminum Characteristics
7049-T73 aluminum alloy is a high-strength material that, after special heat treatment, offers excellent mechanical properties. It is particularly suitable for aerospace applications that require high loads and long-term high-stress resistance. Compared to the T6 temper, the T73 condition enhances the material's corrosion resistance, stability, and fatigue resistance, making it perform better in extreme environments.
| Feature | Description |
| Excellent Strength | 7049-T73 aluminum alloy has very high tensile and yield strength, capable of withstanding large loads and pressures, making it suitable for high-strength structural components in aerospace applications. |
| Enhanced Corrosion Resistance | Through the special over-aging treatment, 7049-T73 aluminum alloy exhibits excellent corrosion resistance in marine environments and other harsh climates, making it ideal for components exposed to harsh environments. |
| Excellent Stability | The special treatment of the T73 condition ensures that 7049 aluminum alloy maintains stable mechanical properties even under high-stress conditions, preventing material degradation due to environmental changes. |
| High Fatigue Resistance | Compared to other aluminum alloys, 7049-T73 aluminum alloy has better fatigue resistance, capable of withstanding prolonged cyclic loading, making it suitable for components in high-stress environments. |
| Weldability and Heat Treatability | This alloy has good weldability, making it suitable for joining and repair. The T73 temper enhances the material's stability, making it suitable for applications that undergo high stress and temperature for extended periods. |
7049-T73 Aluminum Performance
| Property | Description |
| Tensile Strength and Yield Strength | Through special heat treatment, 7049-T73 aluminum alloy has high tensile and yield strength, capable of withstanding large mechanical stresses, making it suitable for high-strength applications. |
| Corrosion Resistance | In harsh conditions like wet and marine environments, the T73-tempered alloy has excellent stress corrosion resistance, extending the lifespan of components. |
| Fatigue Life | This alloy has good fatigue resistance, making it suitable for long-term cyclic loading and high-stress conditions, improving the durability of components. |
| Stability and Heat Treatment Effect | The T73 temper improves the alloy's stability, ensuring it maintains consistent performance under prolonged high-stress and high-temperature environments, preventing degradation. |
| Weldability | It has good weldability, making it suitable for the connection and repair of structural components, meeting the needs of complex structures. |
7049-T73 Aluminum Applications
Due to its high strength and corrosion resistance, 7049-T73 aluminum alloy is widely used in aerospace, military equipment, and other fields. These applications require materials that can withstand high-strength loads while also resisting environmental corrosion, and 7049-T73 aluminum alloy meets these needs perfectly.
7049-T73 Aluminum Applications
| Application Field | Detailed Description | Product Form |
| Aerospace Structural Components | 1. Fuselage: 7049-T73 aluminum plates and 7049-T73 aluminum profiles are used as fuselage frames and reinforcements, providing high-strength support to ensure aircraft stability and safety. | 7049-T73 Aluminum Plates, 7049-T73 Aluminum Profiles, 7049-T73 Aluminum Forgings |
| 2. Wings: 7049-T73 aluminum extrusions and 7049-T73 aluminum forgings, especially for wing spars and skins, reduce weight while enhancing bending and tensile strength. | ||
| 3. Landing Gear Supports: 7049-T73 aluminum forgings and 7049-T73 aluminum profiles are used for landing gear support components, which must endure extreme loads and cyclic stresses. 7049-T73 aluminum alloy provides high strength and excellent corrosion resistance. | ||
| High-Strength Lightweight Structures | 1. Military: 7049-T73 aluminum plates, 7049-T73 aluminum profiles, and 7049-T73 aluminum forgings are used for structural components in fighter jets and military transport aircraft, requiring high strength while reducing weight to enhance maneuverability and performance. | 7049-T73 Aluminum Plates, 7049-T73 Aluminum Profiles, 7049-T73 Aluminum Forgings |
| 2. Transportation: Used in high-speed trains and heavy-duty trucks for frame structures and body supports, 7049-T73 aluminum extrusions and 7049-T73 aluminum forgings enhance lightweight construction and corrosion resistance. | ||
| 3. Aircraft Landing Gear: 7049-T73 aluminum forgings and 7049-T73 aluminum profiles provide sufficient strength to withstand extreme loads during landing and take-off while reducing material weight to improve fuel efficiency. |
7049-T73 Aluminum vs. 7049-T7352 Aluminum Comparison
| Property | 7049 T73 | 7049 T7352 |
| Strength | High strength, suitable for high-stress environments | Slightly lower strength than T73 but still higher than most aluminum alloys |
| Corrosion Resistance | Excellent, especially suitable for aerospace environments | Extremely excellent, especially in high-temperature and high-humidity environments |
| Stress Corrosion Resistance | Strong, suitable for long-service structures | Stronger, especially suitable for use in harsh environments |
| Weldability | Good, suitable for welding aerospace structural components | Good, suitable for long-term high-temperature operation |
| Application Field | Aerospace, military, high-strength lightweight structures | Aerospace, military high-pressure vessels, precision machinery |
| Fatigue Life | Good, suitable for high-frequency fatigue loads | Excellent, suitable for long-term load and high-fatigue environments |