2419 Aluminum alloy,Aluminum 2419 alloy,E FORU

### **Aluminum Alloy 2419 Product Introduction** **Aluminum Alloy 2419** is a high-strength aluminum-copper alloy renowned for its exceptional **elevated temperature performance**, excellent **toughness**, and superior **weldability**. It was developed as an advanced variant of the classic 2219 alloy, offering improved strength and thermal stability for the most demanding aerospace and defense applications. AA2419 is particularly valued for its ability to retain mechanical properties at temperatures up to 315°C (600°F), making it a critical material for supersonic and hypersonic vehicle structures. --- #### **1. Chemical Composition** The composition of AA2419 is precisely controlled to optimize its high-temperature strength and damage tolerance. Key elements include (typical values in weight %): | Element | Content (%) | | :--- | :--- | | **Copper (Cu)** | 5.8 - 6.8 | | **Manganese (Mn)** | 0.20 - 0.40 | | **Vanadium (V)** | 0.05 - 0.15 | | **Zirconium (Zr)** | 0.08 - 0.20 | | **Titanium (Ti)** | 0.02 - 0.10 | | **Cadmium (Cd)** | 0.05 - 0.15 | *(Note: Cadmium content is a key differentiator)* | | **Magnesium (Mg)** | 0.02 max | | **Silicon (Si)** | 0.10 max | | **Iron (Fe)** | 0.12 max | | **Zinc (Zn)** | 0.05 max | | **Other Impurities** | each 0.05 max, total 0.15 max | | **Aluminum (Al)** | Balance | * **Copper (Cu)** is the primary strengthening element, forming precipitates during aging. * **Cadmium (Cd)** is a key addition that enhances the alloy's response to precipitation hardening, particularly improving strength at elevated temperatures. * **Zirconium (Zr)** and **Vanadium (V)** form stable dispersoids that control grain structure and enhance recrystallization resistance. --- #### **2. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | Approximately 2.84 g/cm³ | | **Melting Range** | ~ 540 - 650 °C | | **Modulus of Elasticity** | Approximately 73 GPa (10.6 x 10⁶ psi) | | **Thermal Conductivity** | ~ 120-130 W/m·K (at 25°C) | | **Electrical Conductivity** | ~ 34-40% IACS | | **Coefficient of Thermal Expansion** | ~ 22.7 x 10⁻⁶ /K (20-100°C) | --- #### **3. Mechanical Properties** Mechanical properties are highly dependent on temper (heat treatment). Typical properties for the T87 temper are: * **Tensile Ultimate Strength:** 510 - 550 MPa (74 - 80 ksi) * **Tensile Yield Strength:** 450 - 490 MPa (65 - 71 ksi) * **Elongation:** 7 - 10% * **Fracture Toughness:** Very high, with excellent resistance to crack propagation. * **Elevated Temperature Strength:** Retains a significant portion of its room-temperature strength at temperatures above 260°C (500°F). --- #### **4. International Standards** Aluminum Alloy 2419 is specified in several key aerospace and general material standards. * **AMS:** **AMS 4251** (This is the primary Aerospace Material Specification governing the requirements for 2419 alloy plate and sheet). * **ASTM:** While less common in general ASTM standards, it is often produced to meet the property requirements of specifications like **ASTM B209** for sheet and plate. * **Proprietary Standards:** It is extensively used and specified by major aerospace OEMs (e.g., Lockheed Martin) for specific military and high-performance aircraft programs. --- #### **5. Product Applications** AA2419's unique combination of properties makes it the material of choice for the most critical and demanding applications: * **Aerospace Structures:** * **Supersonic and Hypersonic Aircraft Skins:** Its ability to withstand aerodynamic heating is paramount. * **Wing and Fuselage Structures** for high-performance military aircraft. * **Bulkheads** and other primary structural members. * **Rocketry & Space:** * **Solid Rocket Motor Casings** due to its high strength and toughness. * **Launch Vehicle Structures.** * **Military Vehicles:** * **Armored Vehicle Components** where a blend of strength and weight savings is critical. --- #### **6. Key Advantages** * **Superior Elevated Temperature Strength:** Outperforms most other aluminum alloys at temperatures above 150°C (300°F). * **Excellent Fracture Toughness:** Provides high resistance to crack propagation, enhancing durability and damage tolerance. * **Outstanding Weldability:** Can be readily welded using techniques like Gas Tungsten Arc Welding (GTAW/TIG) and Gas Metal Arc Welding (GMAW/MIG), with welded joints retaining high strength. * **Good Stress-Corrosion Cracking Resistance:** Particularly in the T8-type tempers. * **Proven Performance:** A trusted material in critical defense and aerospace programs for decades. **Conclusion** Aluminum Alloy 2419 is a premium, high-performance material engineered for applications where conventional aluminum alloys are pushed beyond their limits. Its exceptional strength at elevated temperatures, combined with superb toughness and weldability, solidifies its role as a strategic material in the advancement of supersonic flight, rocketry, and next-generation defense platforms.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1636 gallon liquid totes Special package is available on request.