7178 O aluminum alloy is a high-strength material known for its excellent fatigue resistance and machinability. Alloyed with zinc and magnesium, 7178 is widely used in aerospace and defense industries for applications requiring high strength and lightweight properties. The O temper indicates that the alloy is in an annealed state, making it soft and suitable for precise forming and machining processes.

7178 O is commonly utilized in aircraft structures, defense vehicles, high-performance equipment, and lightweight automotive components, where durability under challenging conditions is critical. The alloy is compatible with anodizing, forming a protective oxide layer that enhances corrosion resistance and provides an aesthetic finish. However, due to its high zinc content, careful handling is required during anodizing. Its weldability is limited, often favoring mechanical fasteners or specialized welding methods.

In terms of bending and forming, 7178 O aluminum alloy offers good workability due to its soft temper. It is suitable for complex shaping and tight-radius bending applications. However, its high-strength nature requires careful processing during forming. The alloy's fatigue resistance and mechanical stability make it ideal for use in high-vibration environments, ensuring reliability in structures subjected to dynamic loads and challenging mechanical conditions.

Corrosion resistance is moderate, and additional surface treatments or coatings are recommended for use in corrosive environments. Advantages of 7178 O include high strength, excellent fatigue resistance, good formability, and compatibility with anodizing, while its disadvantages are limited weldability and lower natural corrosion resistance. These characteristics make 7178 O an excellent material for applications requiring lightweight, durability, and precision forming.

Choosing Factors for 7178 O

• Rod / Round Bar / Flat Bar
• Tube/Profile
• Plate
• Sheet