2219

EN AW / AlCu6Mn / 2219 / T8

化学性质 % 值
Silicon (Si)0,00 - 0,20
Manganese (Mn)0,20 - 0,40
Magnesium (Mg)0,00 - 0,02
Copper (Cu)5,80 - 6,80
Titanium (Ti)0,00 - 0,15
Iron (Fe)0,00 - 0,30
Zinc (Zn)0,00 - 1,00
Aluminium (Al)Balance
物理特性
Density2.84 g/cm³
Melting Point543 °C
Thermal Expansion22 µm/m°C
Modulus of Elasticity74 GPa
Thermal Conductivity170 W/m.K
Electrical Resistivity44% IACS
机械性能
Proof Strength330 MPa
Yield Strength450 MPa
Shear Strength270 MPa
Elongation A50 mm15%
Hardness130 HB

Alclad 2219 T8 aluminum alloy is renowned for its exceptional strength, thermal stability, and enhanced corrosion resistance. The Alclad version features a thin layer of pure aluminum coating the surface of the 2219 T8 alloy, which provides additional protection against corrosion. The T8 temper indicates that the alloy has undergone solution heat treatment, cold working, and artificial aging to achieve maximum strength and durability. These characteristics make Alclad 2219 T8 an excellent choice for high-performance applications in aerospace, space exploration, and defense industries.

In terms of anodizing, Alclad 2219 T8 aluminum alloy benefits from its pure aluminum coating, making it more suitable for anodizing processes. However, the high copper content in the core alloy can limit the effectiveness of anodizing for long-term corrosion resistance. Therefore, additional protective coatings or surface treatments are often used in harsh environments. The alloy is also highly weldable, making it a reliable option for structural components requiring strong joints. Proper welding techniques and filler materials help mitigate the risk of cracking associated with its copper-rich composition.

The alloy’s high strength makes it less formable than softer tempers, but it can still be successfully bent and shaped with appropriate handling and techniques. Its excellent fatigue resistance and ability to withstand dynamic stresses make it particularly well-suited for high-vibration environments. This makes Alclad 2219 T8 an ideal material for critical structural components such as aircraft fuselages, engine parts, and other components subjected to intense mechanical loads and vibrations.

While the pure aluminum coating enhances corrosion resistance, the copper content in the core alloy can reduce its inherent resistance to certain corrosive conditions. To address this, additional surface treatments are often employed. Advantages of Alclad 2219 T8 aluminum alloy include its high strength, excellent fatigue resistance, and good weldability, while its disadvantages include limited inherent corrosion resistance and careful handling requirements during forming processes. These properties make it an excellent material for applications requiring strength, durability, and thermal stability in demanding environments.

 

ALLOY DESIGNATIONS
 
2219 T8  has the following standard designations and specifications.

As Sheet/Plate; 2219 T8, ASTM B209, UNS A92219, ISO AlCu6Mn, MIL-A-22771

 

Choosing Factors for 2219 T8

  • Strength: Great
  • Machining: Okay
  • Weldability: Great
  • Formability: Fair
  • Corrosion Resistance: Satisfactory
  • Heat Treating: Yes
 

Some Well-Known Applications for 2219 T8

It is mainly used in the aerospace industry.

In pressure tanks, aircraft fuselages and landing gear,

It has many uses, including in bridge construction.

 

SUPPLIED FORMS
 
2219 T8 is produced/supplied in sheet and plate forms.
  • Sheet
  • Plate
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