The 2618A T851 aluminum alloy is a wrought aluminum alloy known for its high-temperature strength and superior mechanical properties, widely used especially in aerospace and defense industries. This alloy belongs to the Al-Cu-Mg-Fe-Ni system and stands out for its ability to retain strength at elevated temperatures. The T851 temper indicates solution heat-treated, stress-relieved, and artificially aged condition, providing significant advantages in dimensional stability and reduction of internal stresses. It is commonly used in jet engine components, pistons, and structural parts exposed to high temperatures.

In terms of corrosion resistance, 2618A T851 performs lower than pure aluminum alloys, but this disadvantage can be significantly reduced through proper surface treatments and anodizing. Its use in marine environments is limited, yet it provides sufficient resistance in controlled environments. Compared to 7075-T6, it offers similar corrosion resistance, while generally performing better than 2024-T351. However, due to its high copper content, attention must be paid to galvanic corrosion.

Regarding strength and high-temperature performance, the 2618A alloy excels particularly in the 150–250°C range. While 7075 alloy offers higher strength at room temperature, it loses strength at elevated temperatures, whereas 2618A remains more stable. Compared to 2014 and 2024 alloys, 2618A provides higher creep resistance and fatigue strength. Therefore, it is preferred in applications subjected to continuous thermal loads, such as engine components.

In terms of machinability and bending properties, the 2618A alloy offers moderate machinability. Due to its hard and strong structure, tool wear may be higher compared to other alloys. Compared to 6061 alloy, it is more difficult to machine, but the resulting mechanical properties compensate for this disadvantage. Its bending capability is limited, and hot forming is generally preferred over cold forming. Under vibration, it exhibits good damping capability, ensuring reliable performance under dynamic loading conditions.

Regarding weldability and coating capability, 2618A alloy is not very suitable for welding processes, and mechanical fastening methods are usually preferred. In contrast, 6061 alloy offers much better weldability. However, 2618A can be coated with appropriate surface treatments, and its surface durability can be enhanced through anodizing. It is widely used in high-performance sectors such as automotive, aerospace, and racing engines, particularly in pistons, cylinder heads, and turbocharger components.

MATERIAL COMPOSITION STANDARDS

2618A T851 can conform to the following standards:
• 2618A T851 Sheet/Plate; ASTM B209, UNS A92618, AIR 9048.640, ISO AlCu2Mg1.5Ni, WNR 3.1924, EN 2123
 

Key Characteristics of 2618A T851: 

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

Some Well-Known Applications of 2618A T851: 
Mainly in the aerospace sector,
In aviation components and as structural parts of engines,
And in many other high-tech industry applications.
 

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We produce/supply 2618A T851 in sheet form.​

• Sheet/Plate