What is 7000 series aluminum | alloy grade 7050 7055 7075 7150 7475 7449 7160
Aluminum Alloys: 7050, 7055, 7075, 7150, 7475, 7449, 7160
These 7000 series aluminum alloys are primarily designed for high-strength applications, particularly in the aerospace and aviation industries. They are typically alloyed with zinc and sometimes with additional elements such as magnesium, copper, and chromium to achieve superior strength-to-weight ratios and resistance to corrosion.
Comparison of 7050, 7055, 7075, 7150, 7475, 7449, and 7160 Aluminum Alloys
Alloy | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation | Key Application |
7050 | 540-570 | 485 | 8-10% | Aircraft fuselages, wings, high-stress aerospace structures |
7055 | 550-580 | 480-510 | 10-12% | Aerospace, military, wing skins, fuselages |
7075 | 570-635 | 505-550 | 7-10% | Aircraft, aerospace, marine, high-performance applications |
7150 | 570-620 | 500-540 | 8-10% | Aircraft wings, fuselages, high-stress components |
7475 | 540-590 | 485-520 | 8-10% | High-stress aerospace parts, wing spars, bulkheads |
7449 | 500-570 | 460-510 | 10-12% | Aircraft fuselages, wings, balance of strength and corrosion resistance |
7160 | 570-620 | 500-550 | 7-10% | Aircraft airframe components, wing structures |
1. Aluminum Alloy 7050
· Key Features:
o Known for high strength and resistance to stress corrosion cracking (SCC), making it suitable for aircraft structures in severe environments.
o Excellent fatigue resistance and creep resistance at high stresses.
o Corrosion resistance is excellent compared to other high-strength alloys, especially in marine and saltwater environments.
· Common Applications:
o Aircraft fuselages and wings.
o Aircraft structures that are exposed to high stress and high fatigue.
o Heavy-duty structures in aerospace where corrosion resistance and strength are critical.
2. Aluminum Alloy 7055
· Key Features:
o Offers high strength and excellent fatigue resistance similar to 7050, but with better resistance to stress corrosion cracking.
o It is specifically designed for aircraft and aerospace applications that require both strength and corrosion resistance.
· Common Applications:
o High-stress aerospace components.
o Aircraft structures such as wing skins, fuselages, and bulkheads.
o Military aerospace applications where high strength and corrosion resistance are necessary.
3. Aluminum Alloy 7075
· Key Features:
o One of the strongest aluminum alloys available, with excellent strength-to-weight ratio.
o Excellent fatigue resistance, strength, and corrosion resistance.
o Commonly used in aircraft, military, and high-performance applications.
· Common Applications:
o Aircraft structures, including wings, fuselages, and control surfaces.
o Aerospace parts requiring high strength and lightweight.
o Marine and defense applications.
4. Aluminum Alloy 7150
Key Features:
o Excellent fatigue resistance, high strength, and good corrosion resistance.
o Similar to 7050, but with slightly improved strength and fatigue properties.
o Designed for high-performance aerospace applications, including aircraft wings and fuselage frames.
Common Applications:
o Aircraft structures like wing spar caps, fuselages, and high-stress components.
o Aerospace components that require maximum strength and fatigue resistance.
5. Aluminum Alloy 7475
· Key Features:
o High strength and excellent fatigue resistance, often used for the most demanding aerospace applications.
o Similar to 7050 but with a higher strength and fatigue resistance.
o Stress corrosion cracking resistance is good but lower than 7050.
· Common Applications:
o High-stress aerospace parts such as wing spars, wing ribs, and bulkheads.
o Aerospace structures that require maximum strength.
6. Aluminum Alloy 7449
Key Features:
o Combines high strength with good stress corrosion cracking resistance.
o It is more corrosion-resistant than 7075, but with slightly lower strength.
o Used in aerospace for structural components where corrosion resistance is critical.
Common Applications:
o Aircraft fuselages, wings, and control surfaces.
o Used in aircraft structures that need a balance between strength and corrosion resistance.
Summary of 7050, 7055, 7075, 7150, 7475, 7449, and 7160 Aluminum Alloys
· 7050 and 7055 are known for their excellent stress corrosion resistance, making them ideal for aerospace applications where parts are exposed to high-stress environments.
· 7075 and 7150 are typically used for high-strength parts in aerospace, with 7075 being one of the strongest and most widely used alloys.
· 7475 offers similar performance to 7050 but with higher strength for more demanding applications.
· 7449 offers a balance between strength and corrosion resistance, used in applications where corrosion resistance is more critical than maximum strength.
· 7160 offers a combination of high strength and fatigue resistance while maintaining good machinability for complex parts.
When choosing between these alloys, consider factors such as strength requirements, fatigue resistance, stress corrosion cracking resistance, and machinability based on the specific needs of your application.