7449 T7951 aluminum alloy is an advanced material belonging to the 7xxx series high-strength aluminum alloys and is widely used particularly in the aerospace and defense industries. This alloy primarily contains zinc, magnesium, and copper, and through the T7951 temper it undergoes stress-relief processes that provide a high-strength structural condition. Its very high yield and tensile strength make it ideal for structural applications carrying heavy loads. Compared with other 7xxx series alloys such as 7075, 7050, and 7150, alloy 7449 stands out especially due to its balanced combination of high strength and improved fracture toughness.

In terms of corrosion resistance, the 7449 T7951 alloy demonstrates enhanced performance particularly against stress corrosion cracking. This property provides safer service compared to the 7075 alloy. While it offers corrosion resistance similar to that of alloy 7050, in certain applications it can provide better fatigue resistance and longer service life. When used together with appropriate surface treatments and coatings, it can exhibit strong resistance in atmospheric and marine environments. For this reason, it is often preferred for aircraft fuselage components, wing attachments, and highly loaded structural parts.

Regarding machinability, the 7449 alloy offers good chip-forming characteristics and can be efficiently processed in modern CNC machining operations. However, due to its high strength, tool wear may be slightly higher compared with 2xxx series alloys. Bendability and formability are limited, which is typical for high-strength 7xxx alloys; in this regard alloys from the 6xxx series such as 6061 can be shaped more easily. Nevertheless, controlled bending and forming operations can still be achieved with proper temperature and processing parameters.

In terms of coating and surface treatment, alloy 7449 is compatible with anodizing, painting, and various protective coating methods. These treatments can further enhance corrosion resistance. Vibration and fatigue response, which are critical parameters in aerospace applications, are favorable in the 7449 alloy due to its high fatigue strength. This characteristic makes it suitable for critical components such as aircraft wing structures and landing gear attachments.

Regarding weldability, the 7449 alloy has limited welding capability similar to other high-strength 7xxx alloys, and mechanical fastening or riveting methods are generally preferred. This alloy is widely used in aerospace, defense, space technologies, and high-performance engineering applications. Compared with 7075 it provides better fracture toughness and stress corrosion resistance, while maintaining strength levels similar to 7050 and sometimes outperforming it in certain applications. Because of these properties, 7449 T7951 has become an important material for modern high-performance structural applications.

MATERIAL COMPOSITION STANDARDS

7449 T7951 is available in the following standards:
• 7449 T7951 Sheet; AMS 4299, ASTM B209, ISO AlZn8Mg2Cu, UNS A9744
 

Characteristic Properties of 7449 T7951: 

• Strength: Excellent
• Machinability: Good
• Weldability: Average
• Formability: Poor
• Corrosion Resistance: Excellent
• Heat Treatment: Yes
   

Some Well-Known Applications of 7449 T7951: 
Used in structural parts in the aerospace industry.
In the automotive industry, it is used in a limited number of components.
 

STOCK
We produce/supply 7449 T7951 in sheet form.

• Sheet