7075 Aluminum Round Tube
7075 aluminum round tube is a seamless tube made from 7075 aluminum alloy, which belongs to the Al-Zn-Mg-Cu series of ultra-hard aluminum alloys.
7075 aluminum is one of the highest-strength aluminum alloys available. When made into a round tube, it exhibits an excellent strength-to-weight ratio, even comparable to certain steels while being significantly lighter. This makes it an ideal choice for applications in aerospace, defense, high-performance automotive components, and sporting equipment.
7075 aluminum round tube is a high-performance structural component made from 7075 aluminum alloy, renowned for its outstanding strength-to-weight ratio.
As a professional manufacturer of 7075 aluminum alloy round tubes, Haomei Aluminum provides high-strength, lightweight, and fatigue-resistant aerospace-grade seamless aluminum tube solutions, specifically designed for extreme working conditions. Utilizing T6/T651 heat treatment processes, it far surpasses mild steel in performance and meets the demands of high-stress applications such as aircraft structural components, missile parts, and racing chassis.
7075 Aluminum Round Tube Characteristics
- High Strength: Superior to 6061, suitable for extreme loads.
- Lightweight: Density ~2.81 g/cm³.
- Fatigue Resistance: Ideal for dynamic applications.
- Machinability: Good; maintains dimensional stability during processing.
- Corrosion Resistance: Lower than 6061; usually anodized or coated for protection.
- Thermal Conductivity: ~130 W/m·K; applicable for thermal management.
7075 Aluminum Round Tube Material Composition
7075 aluminum alloy consists of the following main elements:
- Aluminum: ~90%
- Zinc: 5.1–6.1% – The primary alloying element for strength.
- Magnesium: 2.1–2.9% – Enhances hardenability and strength.
- Copper: 1.2–2.0% – Contributes to increasing the alloy’s strength.
- Chromium: 0.18–0.28% – Improves stress corrosion resistance.
This specific composition gives 7075 its well-known strength while maintaining relatively low density.
7075 Aluminum Round Tube Mechanical Properties
The performance of 7075 aluminum round tube depends on its temper condition. Common tempers include T6 and T651. The typical properties for the 7075-T6 condition are:
- Ultimate Tensile Strength: Approximately 83, 000 psi.
- Yield Strength: Approximately 73, 000 psi.
- Elongation: Ranges from 5–11%.
- Hardness: Approximately 150 (Brinell Hardness).
These mechanical properties make this alloy highly suitable for structural applications where weight reduction is critical.
7075 Aluminum Round Tube Dimensions and Tolerance Specifications
7075 aluminum round tubes are available in various sizes, including:
- Outer Diameter (OD): Ranges from fractions of an inch to several inches, depending on the application (customizable).
- Wall Thickness: Ranges from 1 mm to 25 mm, adjustable based on specific strength and weight requirements.
- Length: Standard lengths up to 6 meters; custom cutting available.
- Tolerance: Custom-cut pieces typically maintain a tolerance of ±0.125 inches, ensuring precision in critical applications.
These dimensions can be customized to meet specific engineering and design requirements.
Standards and Certifications:
- ASTM B221: Standard specification for extruded bars, rods, and tubes.
- AMS 4048/AMS 4049: Aerospace material specifications.
- ISO 6361: Standards for wrought aluminum and aluminum alloy products.
Surface Treatment Options:
- Mill Finish (Extruded Condition).
- Anodizing (Clear or Colored).
- Powder Coating or Painting.
Haomei 7075 Aluminum Round Tube Inventory List
Haomei Aluminum offers a wide range of 7075 aluminum Round tube sizes and tempers in stock, including T6, T73, T7351, and T76.
- Outer Diameter: 1/2", 5/8", 3/4", 7/8", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3"
- Wall Thickness: 1/32", 3/64", 1/16", 5/64", 3/32", 1/8", 5/32", 3/16", 1/4", 5/16", 3/8", 1/2"
| Description | Outer diameter | Wall thickness |
| 1/2" X 1/32" 7075 Aluminum Round Tube | 1/2" | 1/32" |
| 1/2" X 3/64" 7075 Aluminum Round Tube | 1/2" | 3/64" |
| 1/2" X 1/16" 7075 Aluminum Round Tube | 1/2" | 1/16" |
| 1/2" X 5/64" 7075 Aluminum Round Tube | 1/2" | 5/64" |
| 1/2" X 3/32" 7075 Aluminum Round Tube | 1/2" | 3/32" |
| 5/8" X 1/32" 7075 Aluminum Round Tube | 5/8" | 1/32" |
| 5/8" X 3/64" 7075 Aluminum Round Tube | 5/8" | 3/64" |
| 5/8" X 1/16" 7075 Aluminum Round Tube | 5/8" | 1/16" |
| 5/8" X 5/64" 7075 Aluminum Round Tube | 5/8" | 5/64" |
| 5/8" X 3/32" 7075 Aluminum Round Tube | 5/8" | 3/32" |
| 3/4" X 1/32" 7075 Aluminum Round Tube | 3/4" | 1/32" |
| 3/4" X 3/64" 7075 Aluminum Round Tube | 3/4" | 3/64" |
| 3/4" X 1/16" 7075 Aluminum Round Tube | 3/4" | 1/16" |
| 3/4" X 5/64" 7075 Aluminum Round Tube | 3/4" | 5/64" |
| 3/4" X 3/32" 7075 Aluminum Round Tube | 3/4" | 3/32" |
| 3/4" X 1/8" 7075 Aluminum Round Tube | 3/4" | 1/8" |
| 7/8" X 3/64" 7075 Aluminum Round Tube | 7/8" | 3/64" |
| 7/8" X 1/16" 7075 Aluminum Round Tube | 7/8" | 1/16" |
| 7/8" X 5/64" 7075 Aluminum Round Tube | 7/8" | 5/64" |
| 7/8" X 3/32" 7075 Aluminum Round Tube | 7/8" | 3/32" |
| 7/8" X 1/8" 7075 Aluminum Round Tube | 7/8" | 1/8" |
| 1" X 1/16" 7075 Aluminum Round Tube | 1" | 1/16" |
| 1" X 5/64" 7075 Aluminum Round Tube | 1" | 5/64" |
| 1" X 3/32" 7075 Aluminum Round Tube | 1" | 3/32" |
| 1" X 1/8" 7075 Aluminum Round Tube | 1" | 1/8" |
| 1" X 5/32" 7075 Aluminum Round Tube | 1" | 5/32" |
| 1-1/4" X 1/16" 7075 Aluminum Round Tube | 1-1/4" | 1/16" |
| 1-1/4" X 3/32" 7075 Aluminum Round Tube | 1-1/4" | 3/32" |
| 1-1/4" X 1/8" 7075 Aluminum Round Tube | 1-1/4" | 1/8" |
| 1-1/4" X 5/32" 7075 Aluminum Round Tube | 1-1/4" | 5/32" |
| 1-1/4" X 3/16" 7075 Aluminum Round Tube | 1-1/4" | 3/16" |
| 1-1/2" X 3/32" 7075 Aluminum Round Tube | 1-1/2" | 3/32" |
| 1-1/2" X 1/8" 7075 Aluminum Round Tube | 1-1/2" | 1/8" |
| 1-1/2" X 5/32" 7075 Aluminum Round Tube | 1-1/2" | 5/32" |
| 1-1/2" X 3/16" 7075 Aluminum Round Tube | 1-1/2" | 3/16" |
| 1-1/2" X 1/4" 7075 Aluminum Round Tube | 1-1/2" | 1/4" |
| 2" X 1/8" 7075 Aluminum Round Tube | 2" | 1/8" |
| 2" X 5/32" 7075 Aluminum Round Tube | 2" | 5/32" |
| 2" X 3/16" 7075 Aluminum Round Tube | 2" | 3/16" |
| 2" X 1/4" 7075 Aluminum Round Tube | 2" | 1/4" |
| 2" X 5/16" 7075 Aluminum Round Tube | 2" | 5/16" |
| 2-1/2" X 3/16" 7075 Aluminum Round Tube | 2-1/2" | 3/16" |
| 2-1/2" X 1/4" 7075 Aluminum Round Tube | 2-1/2" | 1/4" |
| 2-1/2" X 5/16" 7075 Aluminum Round Tube | 2-1/2" | 5/16" |
| 2-1/2" X 3/8" 7075 Aluminum Round Tube | 2-1/2" | 3/8" |
| 3" X 1/4" 7075 Aluminum Round Tube | 3" | 1/4" |
| 3" X 5/16" 7075 Aluminum Round Tube | 3" | 5/16" |
| 3" X 3/8" 7075 Aluminum Round Tube | 3" | 3/8" |
| 3" X 1/2" 7075 Aluminum Round Tube | 3" | 1/2" |
Advantages and Limitations of 7075 Aluminum Round Tube
Advantages of 7075 Aluminum Round Tube
| Advantage | Description |
| Unmatched Strength | 7075 Aluminum Round Tube boasts extremely high yield and tensile strength, far exceeding most conventional aluminum alloys. This makes it an ideal choice for aerospace, racing, and high-performance structural applications. Its high-strength characteristics allow it to withstand extreme loads while maintaining structural stability, particularly in weight-restricted applications requiring exceptional strength. |
| Lightweight | The 7075 Aluminum Round Tube offers the advantage of being lightweight due to its combination of high strength and low density. It meets stringent strength requirements without adding excessive weight. This characteristic is crucial for the aerospace and automotive industries, improving fuel efficiency and reducing energy consumption while maintaining excellent mechanical performance. |
| Excellent Fatigue Resistance | 7075 Aluminum Round Tube exhibits outstanding fatigue resistance, allowing it to maintain structural integrity under prolonged cyclic loading without failure. This property makes it widely used in aerospace structures, racing chassis, high-speed marine hulls, and other critical components exposed to continuous stress, enhancing overall lifespan and safety. |
Limitations of 7075 Aluminum Round Tube
Lower corrosion resistance, difficult to weld, and more expensive than 6061.
Environmental Resistance of 7075 Aluminum Round Tube
Stress Corrosion Cracking (SCC): Susceptible in harsh environments; proper coatings reduce risk.
7075 Aluminum Round Tube is vulnerable to stress corrosion cracking (SCC) in extreme environments, especially in high humidity, salt spray, or acidic and alkaline conditions. Due to its high strength and relatively lower corrosion resistance, it may develop cracks under sustained tensile stress.
By applying appropriate surface treatments such as anodizing, electroplating, or protective coatings, the SCC risk can be effectively mitigated. These treatments enhance its durability in harsh conditions, ensuring long-term structural stability and safety.
Applications of 7075 Aluminum Round Tube
Aerospace Applications of 7075 Aluminum Round Tube
| Application Field | Description |
| Structural Components | Due to its excellent strength-to-weight ratio and outstanding fatigue resistance, 7075 aluminum round tube is widely used in the aerospace industry for manufacturing high-load-bearing structural components. These components are commonly used in aircraft fuselage frames, wing support structures, and load-bearing frameworks, providing extremely high strength and rigidity while ensuring structural lightweight. Additionally, the good corrosion resistance of 7075 aluminum round tube makes it suitable for complex high-altitude environments, extending the aircraft's service life. |
| Wing Spars | 7075 aluminum round tube plays a crucial role in the manufacturing of aircraft wing spars. As the main load-bearing structure of the wing, wing spars require materials with extremely high strength, fatigue resistance, and bending stiffness. 7075 aluminum round tube effectively withstands aerodynamic forces and loads encountered during flight, while its lower density helps reduce overall weight and improve flight efficiency. Moreover, its excellent machinability allows for the production of high-precision wing spar components through precision machining and welding techniques. |
| Landing Gear Components | Due to its exceptional impact resistance and high strength properties, 7075 aluminum round tube is used to manufacture aircraft landing gear components. Landing gear must withstand immense impact forces and loads during takeoff, landing, and taxiing. The high strength and fatigue resistance of 7075 aluminum round tube ensure that landing gear maintains stable structural performance even under high-frequency use. Additionally, appropriate surface treatments such as anodizing or chemical plating can further enhance its corrosion resistance, allowing it to adapt to various complex operational environments. |
| Aircraft Accessories | 7075 aluminum round tube is also widely used in various aircraft accessories such as control rods, support rods, connectors, and hydraulic system pipelines. These accessories require high strength, fatigue resistance, and good machinability, all of which 7075 aluminum round tube fulfills. Its high rigidity ensures the stability of these accessories, while its excellent machinability allows for precision manufacturing of high-accuracy components. Furthermore, the good corrosion resistance and weather resistance of 7075 aluminum round tube make it suitable for various flight environments, including high humidity, high salt spray, and extreme temperature variations. |
What are the Special Applications of 7075 Round Tube?
Due to its excellent strength and lightweight characteristics, 7075 aluminum round tube is widely used in:
- Automotive: Used in high-performance vehicle components, racing chassis, and suspension components where weight reduction is crucial.
- Defense: Used in critical components requiring durability and minimal weight.
- Sports Equipment: Such as bicycle frames and high-end sports gear.
Its fatigue resistance and corrosion resistance play a key role in these demanding environments.
Typical Industrial Applications of 7075 Round Tube
Industrial: Robotics, high-stress structural frameworks.
7075 aluminum round tube is a high-performance, lightweight, and durable material, making it ideal for applications where both high strength and weight reduction are critical. Its exceptional mechanical properties stem from a carefully balanced chemical composition and precise heat treatment process, making it the preferred choice in industries where reliability and performance are essential.
Comparison of 7075 Round Tube with Other Alloys
Comparison of 7075 Aluminum Round Tube with 7050 Aluminum Round Tube
7075 aluminum round tube has extremely high strength and good machinability, making it widely used in aerospace structural components, wing spars, and landing gear.
Compared to 7050 aluminum round tube, 7075 has slightly inferior corrosion resistance, particularly in stress corrosion cracking (SCC), where 7050 performs better.
- For structures requiring higher corrosion resistance, 7050 aluminum round tube is often a better choice.
- For applications requiring ultimate strength and lightweight properties, 7075 aluminum round tube remains advantageous.
Additionally, 7050 has better quench sensitivity, ensuring more uniform performance in large-sized parts. Therefore, 7050 aluminum round tube is more favored for thick-walled structural components and high-load-bearing structures.
Differences Between 7A04 Aluminum Round Tube and 7075 Aluminum Round Tube
Both 7A04 and 7075 aluminum round tubes belong to the high-strength aluminum alloy category, but 7A04 is an earlier high-strength aluminum alloy primarily used for aerospace structural components. While 7A04 has strength comparable to 7075, it has relatively poor corrosion resistance, especially in stress corrosion resistance, requiring stricter anti-corrosion treatments in practical applications.
In contrast, 7075 aluminum round tube exhibits superior strength, hardness, and fatigue resistance, along with better comprehensive mechanical properties, making it the preferred material in modern aerospace manufacturing. Furthermore, 7A04 has lower process plasticity, whereas 7075 aluminum round tube offers better machining adaptability, meeting more complex design requirements.
How Does 6061 Aluminum Alloy Compare with 7075?
Compared to 6061, although 6061 offers better corrosion resistance and weldability, 7075 excels in high-stress environments where strength is critical. For load-bearing applications, choose 7075; for general-purpose applications, choose 6061.
Manufacturing Process of 7075 Aluminum Round Tube
7075 aluminum round tube is typically produced using the following processes:
- Extrusion or Cold Drawing: Ensures uniform wall thickness and consistent mechanical properties in seamless tubes.
- Heat Treatment (e.g., T6, T651): The alloy undergoes solution heat treatment, quenching, and artificial aging to reach peak strength.
Seamless structures are particularly valuable as they eliminate welds or joints, ensuring uniformity and reliability in high-stress applications.
Manufacturing Considerations:
- Welding: Challenging due to susceptibility to cracking; requires specialized techniques (e.g., TIG welding using 5356 filler). Mechanical fastening is preferable.
- Machining: Performs well with sharp tools; can produce smooth surfaces.
- Finishing: Typically involves anodizing, painting, or powder coating to enhance corrosion resistance and aesthetics.
Usage Considerations
- Processing Conditions: Coolant should be used to reduce cutting temperature and prevent work hardening, which may cause tool wear.
- Environmental Adaptability: If exposed to highly corrosive environments (such as marine climates) for extended periods, additional surface coating treatment is recommended.
- Weldability: 7075 aluminum alloy has poor weldability; riveting or bolted connections are recommended as alternatives to welding.
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