2219 clad T8 aluminum alloy is a copper-based (Al-Cu) alloy developed for aerospace and high-strength applications. The T8 temper is achieved through solution heat treatment, cold working, and artificial aging, which gives the alloy high tensile and yield strength. The clad version includes a layer of pure aluminum on the surface, significantly improving corrosion resistance. This combination of properties makes it ideal for critical applications such as fuel tanks, rocket structures, and pressure vessels requiring high temperature resistance.

In terms of corrosion resistance, 2219 clad T8 performs significantly better than unclad 2219. The pure aluminum cladding provides protection against galvanic corrosion and extends service life in aggressive environments. However, 5xxx series alloys (such as 5083) naturally offer better corrosion resistance in marine environments. In contrast, 2024 alloy is more susceptible to corrosion, especially when not clad. Although 7075 offers high strength, it is generally more sensitive to corrosion and often requires surface protection.

Regarding strength and mechanical properties, 2219 T8 stands out for maintaining its strength at elevated temperatures. It reaches strength levels comparable to 2024 and 7075, but retains its properties better around 300°C. Compared to 6061, it provides significantly higher strength, although it lacks the versatility and weldability of 6061. In terms of vibration response, 2219 exhibits good fatigue resistance due to its stable microstructure and performs reliably under dynamic loading.

Machinability and bending properties are limited due to the T8 temper. Because of its high strength, forming is typically done in T3 or O temper followed by aging. This creates a disadvantage compared to more formable alloys like 6061. However, with proper cutting parameters, good machinability can be achieved. In terms of coating (such as anodizing), the copper content may limit aesthetic results but it remains suitable for technical coatings.

In terms of weldability, 2219 is one of the best weldable alloys in the Al-Cu series and performs well with TIG and MIG welding. This gives it a significant advantage over 2024 and 7075, which are more prone to cracking during welding. 2219 clad T8 is widely used in aerospace, defense, cryogenic tanks, and space technologies. Its high temperature strength, good weldability, and improved corrosion resistance make it a critical engineering material.

MATERIAL COMPOSITION STANDARDS

2219 T8 clad can be available under the following standards:
• 2219 T8 Alclad Sheet; ASTM B209, UNS A92219, ISO AlCu6Mn, MIL-A-22771
 

Characteristic Properties of 2219 T8 clad: 

• Strength: Very good
• Machinability: Poor
• Weldability: Very good
• Formability: Moderate
• Corrosion Resistance: Significant
• Heat Treatment: Yes
   

Well-Known Applications of 2219 T8 clad: 
Used in liquid oxygen and liquid hydrogen containers,
In aircraft landing gear and fuselage components,
In fuel tanks and welding applications requiring high strength.
 

​STOCK
We produce/supply 2219 T8 clad in sheet form.​

• Sheet