7075 clad with 7072 T76 aluminum alloy is a high-strength 7075 alloy that is coated with 7072 alloy (a high-purity aluminum alloy with low alloying additions, mainly zinc) to enhance corrosion resistance and processed to the T76 temper condition. This structure preserves the high mechanical strength of the 7075 core while providing improved resistance to corrosion and especially stress corrosion cracking through the 7072 cladding layer. The T76 temper is an overaged condition optimized to provide better stress corrosion resistance compared to T6.

In terms of corrosion resistance, the 7072 cladding provides a significant advantage. While 7075 alloy is naturally susceptible to corrosion due to its copper content, the 7072 layer is more anodic and acts as a sacrificial protective barrier. This makes it particularly suitable for humid, marine, or aggressive environments. It operates on a similar principle to 2024 clad alloys, but the 7075 base provides higher strength. On the other hand, alloys such as 5083 offer superior natural corrosion resistance even without cladding.

Regarding strength and mechanical properties, 7075-T76 provides high strength values close to T6, but with improved resistance to stress corrosion cracking. Compared to 6061-T6, it offers significantly higher yield and tensile strength. When compared to 2024-T3, it generally provides higher static strength, although 2024 may exhibit better fatigue performance. Therefore, 7075-T76 is preferred in safety-critical and high load-bearing applications.

In terms of machinability, bending, and weldability, 7075-T76 offers good machinability but limited formability due to its high strength. The T76 temper provides slightly better ductility than T6, but it is still more difficult to form than 5xxx and 6xxx series alloys. Weldability is poor, and mechanical fastening methods are generally preferred. In terms of coating, the 7072 clad layer already provides inherent protection, reducing the need for additional surface treatments in many cases.

Regarding vibration behavior and applications, 7075 clad with 7072 T76 is widely used in aerospace, defense, and advanced engineering applications due to its high specific strength and improved corrosion resistance. Typical applications include aircraft wing structures, fuselage panels, and highly stressed components. While 6061 is used in general engineering, 5083 in marine applications, and 2024 in aerospace structures, the clad 7075-T76 version offers one of the best combinations of strength and durability among these alloys.

MATERIAL COMPOSITION STANDARDS

7075 T76 is available according to the following standards:
• 7075 T76 Alclad 7072 Sheet; AMS QQ-A-250/25, ASTM B209, DTD 5110
                                

Characteristic Properties of 7075 T76 with 7072 Cladding: 

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

Well-Known Applications of 7075 T76 Clad with 7072: 
Aircraft structural components
Aerospace projects sensitive to friction and heat
Laboratory projects with high humidity requirements
 

STOCK
Available in 7075 T76 clad 7072 Sheet form.

• Sheet