Aluminum 7178 round/square pipe/tube

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7178 aluminum alloy is known for its high strength and good machinability, making it a preferred choice for critical aerospace and structural applications. Here's an overview of its mechanical properties and application fields:

1. Composition: The 7178 aluminum alloy primarily comprises aluminum, with zinc as the main alloying element. It also contains magnesium and copper, contributing to its high strength.

2. Mechanical Properties:

   • Exceptional Strength: 7178 is one of the highest strength aluminum alloys available. Its strength can be compared with many steel alloys.
   • Good Machinability: Despite its high strength, it maintains good machinability.
   • Moderate Corrosion Resistance: Its corrosion resistance is moderate, and it may require protective coatings for certain applications.
   • Limited Weldability: Due to its high zinc content, its weldability is somewhat limited compared to other aluminum alloys.
   • Toughness: It exhibits good toughness and fatigue resistance.

3. Thermal Properties:

   • The thermal conductivity of 7178 aluminum is relatively lower than some other aluminum alloys.
   • It has a higher melting point, typical of high-strength aluminum alloys.

4. Application Fields:

   • Aerospace Industry: 7178 aluminum is primarily used in aerospace applications where high strength is crucial, such as in airframe components and fittings.
   • Military Applications: Its high strength-to-weight ratio makes it suitable for military aircraft and armored vehicles.
   • Structural Applications: In structural applications, it's used for parts where strength is more critical than weldability or corrosion resistance, such as in certain bridge components and structural frames.
   • High-Performance Sporting Equipment: Sometimes used in high-performance sports equipment where strength and weight are important, like bicycle frames and climbing gear.

7178 aluminum alloy's primary advantage is its high strength, making it suitable for applications where strength is more critical than weldability or corrosion resistance. However, its use may be limited by its moderate corrosion resistance and welding challenges. It is often chosen for applications where weight savings are crucial without compromising strength, especially in aerospace and military industries.