7A09 T6 T651 Aerospace Aluminum Bars
7A09 aluminum alloy is a typical high-strength aerospace aluminum material belonging to the 7XXX series of aluminum alloys, primarily featuring zinc as the main alloying element, with small amounts of magnesium, copper, and other elements added for strengthening.
Due to its excellent mechanical properties and good corrosion resistance, 7A09 aluminum alloy is widely used in the aerospace industry, especially suitable for manufacturing high-strength structural components such as aircraft frames, fuselage skins, and beams.
Characteristics of 7A09 Aerospace Aluminum Bar
- 1. High Strength: 7A09 aluminum alloy exhibits excellent strength properties, especially after heat treatment, where its strength can rival that of some steels.
- 2. Good Corrosion Resistance: Although aluminum alloys generally have average corrosion resistance, the corrosion resistance of 7A09 can be improved with appropriate surface treatments.
- 3. Machinability: It can be processed through methods such as heat treatment and cold working, making it suitable for manufacturing various complex-shaped parts.
The specification of 7A09 aerospace aluminum round bars
| 7A09 aerospace aluminum round bar specification | |
| Alloy | 7A09 Aerospace aluminum alloy |
| Temper | T6, T651 |
| Out diameter (OD) | 3.0mm-600mm |
| Length(mm) | Common 1500/3000/5000/6000mm |
| Standard | AMS 4124/AMS 4123/AMS 4125/ASTM B221 |
Chemical composition of 7A09 aluminum aircraft bar
| Chemical composition | |
| Al | REM |
| Si | ≤0.5 |
| Fe | ≤0.5 |
| Cu | 1.2-2.0 |
| Mn | ≤0.15 |
| Mg | 2.0-3.0 |
| Cr | 0.16-0.30 |
| Ni | / |
| Zn | 5.1-6.1 |
| Ti | ≤0.10 |
| Note:Each:≤0.05;Total:≤0.15 | |
Mechanical properties of 7A09 aircraft square bar
| Physical Property | ||||||
| Alloy | Temper | Dimensions /mm | Room temperature test result | |||
| Tension strength/MPa | Yield strength/MPa | Elongation/% | ||||
| A50mm | A | |||||
| Not less than | ||||||
| 7A09 | T6 T651 | All | 530 | 400 | ≥6 | |
Heat Treatment Performance of 7A09 Aluminum Bar
7A09 aluminum alloy can enhance its hardness and strength through T6 heat treatment. T6 heat treatment includes solution treatment and artificial aging, resulting in materials with higher tensile strength and yield strength while maintaining a certain level of plasticity.
Weldability and Machinability of 7A09 Aluminum Bar
- Weldability: Generally poor, as welding may lead to a decline in material properties and cracks at the welded joints. Typically, rivets or other mechanical connections are used instead.
- Machinability: The cutting performance of 7A09 aluminum alloy is good, but it needs to be processed in the heat-treated state to ensure accuracy.
Applications of 7A09 Aerospace Aluminum Bar
1. Aircraft Structural Components
- Fuselage Frame: Due to its high strength and lightweight characteristics, 7A09 aluminum alloy is commonly used in the frame structures of aircraft fuselages to reduce overall weight and enhance structural strength.
- Wing Beams and Ribs: In the wing structures of aircraft, 7A09 aluminum alloy is used to manufacture wing beams and ribs, providing the necessary strength and stiffness to support the load capacity of the wings.
2. Fittings and Connectors
- Connectors: 7A09 aluminum alloy can be made into various connectors, such as bolts and rivets, to ensure secure connections in the aircraft structure.
- Support Components: In the internal structure of the aircraft, 7A09 aluminum alloy is often used to manufacture support components to provide additional structural support.
3. Landing Gear Components
The landing gear is an essential part of an aircraft, and due to its high strength and fatigue resistance, 7A09 aluminum alloy is suitable for manufacturing certain components of the landing gear.
4. Engine Components
In some structural components of aircraft engines, 7A09 aluminum alloy is also used as a high-strength material to withstand high temperatures and high-pressure working environments.
The application of 7A09 aluminum bars in the aviation industry plays an important role, especially in components that require high load capacity, lightweight design, and high fatigue and corrosion resistance. Its lightweight and high-strength characteristics help enhance structural strength while effectively reducing weight, thereby improving fuel efficiency, extending range, and ensuring flight safety.
