2219-T851 aluminum alloy is a copper-based (2xxx series) alloy developed for applications requiring high strength and superior temperature resistance. It is widely used especially in the aerospace and space industry, in cryogenic tanks, rocket bodies, and structural components operating at high temperatures. This alloy achieves optimal mechanical properties through solution heat treatment, stress relieving, and artificial aging processes thanks to the T851 temper. Its ability to maintain its strength at high temperatures is one of the most important features that distinguishes it from many other aluminum alloys.

In terms of corrosion resistance, although 2219 alloy shows lower performance compared to pure aluminum or the 5xxx series, this disadvantage can be largely eliminated with appropriate surface treatments and coatings. It is highly suitable in terms of coatability (anodizing and painting) and is generally used together with protective coatings. For example, when compared to 7075 alloy, 2219 offers better weldability, while 7075 has higher room temperature strength. When compared to 5083 alloy, 5083 provides better natural corrosion resistance, while 2219 shows a significant advantage in high temperature performance.

In terms of strength properties, 2219-T851 alloy has high tensile and yield strength and stands out especially for its ability to maintain these values at high temperatures. When compared to 2024 alloy, 2024 has better fatigue resistance, while 2219 offers better high temperature performance. The vibration and fatigue behavior of the alloy is quite stable under proper design and production conditions and exhibits reliable performance under dynamic loads. Therefore, it is preferred in aerospace components operating in vibrating environments.

In terms of machinability, 2219 alloy offers a medium level of performance and exhibits characteristics specific to the 2xxx series. It requires careful parameter selection during machining processes. Its bending (forming) capability is limited in the T851 temper and forming operations are generally carried out before tempering. This situation creates a disadvantage compared to alloys such as 6061, which are more formable. However, this limitation can be accepted in applications requiring high strength.

In terms of weldability, 2219 alloy is one of the most weldable alloys within the 2xxx series. It provides successful results especially with TIG and MIG welding methods and largely retains its mechanical properties after welding. This feature makes it indispensable in critical applications such as cryogenic tanks and pressure vessels. In general evaluation, 2219-T851 alloy is a material of strategic importance in the aerospace, defense and space industries with its high temperature resistance, good weldability and sufficient mechanical properties.

STANDARDS FOR MATERIAL COMPOSITION

The 2219 T851 alloy can conform to the following standards:
• 2219 T851 Sheet; AMS 4295D, UNS A92219, ISO AlCu6Mn, ASTM B209, AMS QQ-A-250/30A
• 2219 T851 Plate; AMS 4295D, UNS A92219, ISO AlCu6Mn, ASTM B209, AMS QQ-A-250/30A
• 2219 T851 Cold Drawn Rod; AMS 4163, UNS A92219, ISO AlCu6Mn, ASTM B221
• 2219 T851 Cold Drawn Bar; AMS 4163, UNS A92219, ISO AlCu6Mn, ASTM B221
• 2219 T851 Wire; AMS 4163, UNS A92219, ISO AlCu6Mn, ASTM B221
• 2219 T851 Tube; AMS 4163, UNS A92219, ISO AlCu6Mn, ASTM B221
• 2219 T851 Cold Drawn Seamless Tube; AMS 4066 (replaces AMS 4065), UNS A92219, ISO AlCu6Mn, ASTM B241
 

Characteristic Properties of 2219 T851: 

• Strength: Excellent
• Machinability: Low
• Weldability: Very Good
• Formability: Fair
• Corrosion Resistance: Above Average
• Heat Treatment: Yes
   

Common Applications of 2219 T851:
Landing gear of aircraft,
Bicycle frames and fuel tanks,
Reinforced engines and their structural frames.
 

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We produce and supply 2219 T851 in sheet/plate, rod/bar, and tube/profile forms.​

• Sheet/Plate
• Rod / Bar
• Tube / Profile