There are various aluminum alloys used for CNC, each with its own unique properties, making them suitable for different applications:

· 6061: This is the most commonly used aluminum alloy due to its excellent combination of strength, corrosion resistance, and machinability. It is widely used in aerospace, automotive, and general engineering applications.

· 7075: A high-strength alloy known for its excellent fatigue resistance and tensile strength. It is often used in aerospace applications where maximum strength and durability are required.

· 2024: Another high-strength alloy with good fatigue resistance. It is commonly used in aircraft structures and other critical components.

· 5052: A soft, ductile alloy with good corrosion resistance. It is often used for forming and stamping applications, such as sheet metal fabrication.

· 3003: A softer alloy with excellent formability. It is often used for deep drawing and other forming operations.

· 1100: A pure aluminum alloy with good conductivity and corrosion resistance. It is commonly used in heat exchangers, electrical conductors, and food processing equipment.

The choice of aluminum alloy depends on the specific requirements of the application, such as strength, corrosion resistance, and machinability.