7049 T76511 aluminum alloy belongs to the Al-Zn-Mg-Cu based 7000 series and is developed for extrusion applications requiring high strength along with maximum resistance to stress corrosion cracking (SCC). The T76511 temper includes solution heat treatment, stress relieving (after extrusion), and advanced overaging. Compared to T73511, this temper provides lower strength but maximizes SCC resistance and long-term structural reliability.

In terms of corrosion resistance, 7049 T76511 is among the highest SCC-resistant tempers within the 7000 series. It significantly outperforms 7075-T6 and provides reliability comparable to 7040 T7651. Although its general corrosion resistance is lower than that of 6000 series alloys, it performs much more reliably in aggressive and humid environments. Therefore, anodizing and protective coatings are recommended.

Regarding strength and mechanical properties, 7049 T76511 maintains high strength, although slightly lower than T73511. In return, toughness, crack propagation resistance, and damage tolerance are maximized. Compared to 7075-T6, it offers lower strength but significantly higher structural safety. Compared to alloys such as 7022 and 7010, it stands out with superior SCC performance.

In terms of machinability, bendability, and weldability, 7049 T76511 offers good machinability and is suitable for machining operations. However, its weldability is limited and generally not preferred. Its bending capability is low, and forming operations are typically performed before heat treatment. Its use in extrusion form enables the production of long and complex profiles.

Regarding coating ability, vibration behavior, and applications, 7049 alloy is suitable for anodizing and protective coatings. Its decorative surface quality is limited, but performance can be enhanced with functional coatings. Its vibration damping capacity is low. Main application areas include aerospace industry, defense sector, extruded structural profiles, and high-reliability components. 7049 T76511 is one of the safest alloys for critical extrusion applications requiring maximum SCC resistance and long service life.

MATERIAL COMPOSITION STANDARDS

7049 T76511 is available in the following standards:
• 7049 T76511 Extrusion Round Bar; AMS 4159, ASTM B221, ISO AlZn8MgCu, AFNOR A-Z8GU, UNS A97049 
• 7049 T76511 Extrusion Sheet; AMS 4159, ASTM B221, ISO AlZn8MgCu, AFNOR A-Z8GU, UNS A97049 
• 7049 T76511 Extrusion Tube; AMS 4159, ASTM B221, ISO AlZn8MgCu, AFNOR A-Z8GU, UNS A97049 
 

Characteristic Properties of 7049 T76511: 

• Strength: High
• Machinability: Above Average
• Weldability: Poor
• Forming: Moderate
• Corrosion Resistance: Excellent
• Heat Treatable: Yes
   

Common Applications of 7049 T76511: 
Used as structural material in aircraft,
In military missile and ammunition structures,
Also used in machinery and chemical industries.
 

STOCK
We produce/supply 7049 T76511 in rod/sheet form.

• Rod/Sheet