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7075 Aluminum Square Tubing

7075 aluminum square tubing is a high-performance structural component, known for its exceptional strength-to-weight ratio and versatility in demanding applications.

7075 aluminum square tubing is made from 7075 aluminum alloy, which is primarily aluminum-based and contains significant amounts of zinc, magnesium, and copper. This combination gives the alloy a very high strength-to-weight ratio, making it one of the strongest aluminum alloys, with strength comparable to some low-carbon steels, but much lighter in weight.

7075 Aluminum Square Tubing

7075 Aluminum Square Tubing Sizes and Specifications

Specification Size Range Wall Thickness Standards
Square Tubing Side length from 10 mm to 200 mm 1-7 mm Conforms to ASTM B210, AMS-WWT-700/7, and EN 755-2 standards
Custom Sizes Maximum size up to 1200×1200 mm Customizable based on requirements Conforms to ASTM B210, AMS-WWT-700/7, and EN 755-2 standards

7075 Aluminum Square Tubing Key Features and Composition

  • Composition: Typically contains about 5.6–6.1% zinc, 2.1–2.9% magnesium, and 1.2–2.0% copper, along with trace amounts of other elements.
  • Strength: Its high tensile and yield strengths are achieved through precise heat treatment processes. For example, in T6 condition, 7075 aluminum can reach a tensile strength of over 70, 000 psi, while the T651 variant is more controlled and achieves minimal residual stresses.
  • Corrosion Resistance: Although 7075's corrosion resistance is not as high as other aluminum alloys (such as those in the 5000 series), it still performs well in many environments and can be further protected through anodizing or powder coating.

7075 Aluminum Square Tubing Applications

Due to its outstanding strength-to-weight ratio, 7075 aluminum square tubing is widely used in aerospace, military, and high-performance automotive industries, where strict requirements are necessary. Its properties make it an ideal choice for components that require high structural integrity without adding excessive weight. Other applications include sports equipment (such as bicycle frames and climbing gear), industrial machinery, and precision engineering parts.

Application Area Description
Aerospace 7075 aluminum square tubing is widely used in the aerospace industry due to its excellent fatigue resistance and high strength. It is applied in structural components like wing spars and fuselage frames, capable of withstanding the immense loads and pressures experienced during flight. This makes 7075 aluminum alloy an essential material in aircraft design, offering both lightweight and high-performance advantages.
Military In the military sector, 7075 aluminum square tubing is used in the manufacturing of firearms, missile components, and armored vehicles. Its superior strength and corrosion resistance meet the demands of these high-stress and high-pressure applications. For example, 7075 aluminum alloy is used in armored vehicle structural components, providing high durability and lightweight characteristics, enhancing the operational performance and mobility of weaponry.
Automotive The use of 7075 aluminum square tubing in the automotive industry has been growing, especially in the production of lightweight chassis and suspension systems. Due to its high strength and low density, 7075 aluminum square tubing can significantly reduce the overall weight of the vehicle, improving fuel efficiency without sacrificing structural strength. This material helps enhance automotive performance while meeting environmental and energy efficiency standards.
Sports Equipment In the sports equipment sector, 7075 aluminum square tubing is widely used in the manufacturing of bicycle frames, climbing gear, and tent poles. Due to its exceptional durability and lightness, 7075 aluminum alloy provides athletes with stronger gear that enables them to maintain high performance in intense sports. Whether in extreme sports or everyday activities, 7075 aluminum alloy offers ideal strength and durability.

7075 Aluminum Square Tubing Superior to Other Alloys

  • Strength-to-weight ratio: Twice the strength of 6061-T6 aluminum, making it ideal for weight-sensitive designs.
  • Machinability: Easily machinable through CNC milling, drilling, or welding (using friction methods).
  • Customization: Available with polished, anodized, or powder-coated finishes to meet both aesthetic and functional needs.

Limitations and Considerations

  • Temperature Sensitivity: Due to reduced high-temperature strength, it is not recommended for use above 120°C for extended periods.
  • Cost: Higher than 6000 series alloys, but its superior performance justifies the price.

7075 Aluminum Square Tubing Manufacturing and Finishing

7075 aluminum square tubing is typically produced through an extrusion process, where the heated alloy is forced through a die to form a hollow, uniform square cross-section.

After extrusion, the tubing is often cold-worked to achieve tight tolerances (usually within ±0.125 inches) and smooth surface finish.

It is available in various temper states (e.g., T6, T651, and even T73 to enhance stress corrosion resistance) to meet specific mechanical and application requirements. Surface treatments (e.g., anodizing, brushing, or powder coating) can be applied to enhance appearance and durability.

Manufacturing Methods:

  • Extrusion: Commonly used to form square profiles, followed by heat treatment (e.g., T6 temper) to maximize strength.
  • Cold Drawing: Improves dimensional accuracy, surface smoothness, and mechanical properties. Wall thickness can be as thin as 0.5mm, with tolerances of ±0.05mm.

Tempering:

  • T6: Maximum strength, ideal for aerospace and high-stress applications.
  • T73: Balances strength and improved stress corrosion resistance, suitable for marine environments.

7075 aluminum square tubing offers a combination of strength, precision, and versatility, making it the material of choice for applications where performance and reliability are critical.

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