The 2024-T651 aluminum alloy is a copper (Cu)-based 2xxx series alloy developed for applications requiring high strength. This alloy stands out particularly for its high mechanical strength and is stabilized through solution heat treatment, artificial aging, and stress relief processes (T651 temper). This minimizes internal stresses and reduces the risk of deformation after machining. However, due to its copper content, its corrosion resistance is moderate and often needs to be supported by surface protection methods.

In terms of strength, 2024-T651 is significantly superior to 6xxx series alloys. For example, compared to 6061-T6, it offers much higher yield and tensile strength, while 6061 provides better corrosion resistance and weldability. The 7075-T6 alloy offers higher strength than 2024, but 2024 stands out with better fatigue resistance and crack propagation resistance. Therefore, 2024-T651 is preferred in applications involving dynamic loads.

In terms of machinability, 2024-T651 exhibits very good performance. It behaves stably in machining processes and facilitates achieving tight tolerances. However, its bending and forming capability is limited, especially in the T651 temper where ductility is low. Therefore, complex forming operations are usually performed in lower tempers. Additionally, it provides good damping and fatigue performance in systems operating under vibration.

In terms of coatability, the 2024 alloy is generally protected by anodizing and coating processes. However, due to its copper content, the surface quality after anodizing may not be as homogeneous as some other alloys. Weldability is poor; there is a high risk of cracking during welding, so riveting or mechanical fastening is usually preferred. This is a standard approach especially in aerospace applications.

In terms of applications, 2024-T651 is widely used in aerospace, defense, automotive, and high-performance engineering applications. Aircraft fuselage components, wing structures, connection plates, and high load-bearing parts are typical uses of this alloy. Although it has lower corrosion resistance than marine alloys such as 5083, it is preferred in structural applications due to its strength advantage.

MATERIAL COMPOSITION STANDARDS

2024 T651 can be produced according to the following standards:
• 2024 T651 Extruded Round Bar; AMS QQ-A-200/3, ASTM B221
• 2024 T651 Extruded Plate; AMS QQ-A-200/3, ASTM B221
 

Characteristic Properties of 2024 T651: 

• Strength: Good
• Machinability: Above Average
• Weldability: Average (Spot welding is preferred)
• Formability: Poor
• Corrosion Resistance: Moderate
• Heat Treatment: Yes
   

Some Well-Known Applications of 2024 T651:
It is used in the automotive sector and
in the frameworks of aircraft.
 

STOCK
We supply/manufacture 2024 T651 in rod/plate and tube/profile forms.

• Rod/Plate