2397 Aluminum alloy,Aluminum 2397 alloy,E FORU

### **Aluminum Alloy 2397 Product Introduction** **Aluminum Alloy 2397** is a third-generation Al-Li (Aluminum-Lithium) alloy renowned for its exceptional combination of low density, high strength, excellent fatigue and cryogenic properties. It was primarily developed to meet the demanding requirements of the aerospace and defense industries, offering significant weight savings and performance enhancements over conventional aluminum alloys. This alloy represents a major advancement in material science, providing a superior strength-to-weight ratio and enhanced damage tolerance, making it an ideal choice for critical structural applications. --- #### **1. Chemical Composition** The composition of AA2397 is carefully balanced to optimize its mechanical properties and corrosion resistance. The key elements are (typical values in weight %): | Element | Content (%) | | :--- | :--- | | **Lithium (Li)** | 1.1 - 1.7 | | **Copper (Cu)** | 2.5 - 3.1 | | **Manganese (Mn)** | 0.25 - 0.6 | | **Zirconium (Zr)** | 0.08 - 0.15 | | **Magnesium (Mg)** | 0.25 max | | **Zinc (Zn)** | 0.10 max | | **Silicon (Si)** | 0.10 max | | **Iron (Fe)** | 0.10 max | | **Other Impurities** | each 0.05 max, total 0.15 max | | **Aluminum (Al)** | Balance | * **Lithium (Li)** is the primary alloying element, reducing density and increasing elastic modulus. * **Copper (Cu)** contributes significantly to strength through precipitation hardening. * **Zirconium (Zr)** forms dispersoids that control grain structure and improve toughness. --- #### **2. Physical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | Approximately 2.68 g/cm³ (about 5% lower than traditional 2XXX series alloys) | | **Melting Range** | ~ 610 - 655 °C | | **Modulus of Elasticity** | Approximately 78 GPa (higher than conventional aluminum alloys) | | **Thermal Conductivity** | ~ 120 W/m·K (at 25°C) | | **Electrical Conductivity** | ~ 30-35% IACS | | **Coefficient of Thermal Expansion** | ~ 22.5 x 10⁻⁶ /K | --- #### **3. Mechanical Properties** Mechanical properties vary with temper (heat treatment condition). Typical properties for T87 temper are: * **Tensile Ultimate Strength:** 490 - 530 MPa * **Tensile Yield Strength:** 430 - 470 MPa * **Elongation:** 6 - 10% * **Fatigue Strength:** Excellent fatigue crack growth resistance. * **Fracture Toughness:** High fracture toughness, especially in the short-transverse direction. --- #### **4. International Standards** Aluminum Alloy 2397 is covered by several international standards, which specify its chemical, mechanical, and processing requirements. * **AMS:** **AMS 4413** (Plate and Sheet) * **ASTM:** **B 209** (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate) * **Proprietary Standards:** As a specialized aerospace alloy, it is also often produced to meet specific customer and OEM specifications (e.g., from Airbus, Boeing). --- #### **5. Product Applications** Due to its superior properties, AA2397 is extensively used in high-performance applications, primarily in: * **Aerospace Structures:** * **Fuselage Skins** and stringers * **Lower Wing Skins** * **Space Launch Vehicles** and fuel tanks * **Defense Applications:** * Military aircraft structural components * **Cryogenic Applications:** * **Liquid Oxygen and Hydrogen Fuel Tanks** for spacecraft and launch vehicles, due to its exceptional strength and toughness at cryogenic temperatures. --- #### **6. Key Advantages** * **Weight Reduction:** Lower density directly translates to lighter structures, improving fuel efficiency and payload capacity. * **High Strength-to-Weight Ratio:** Provides exceptional structural efficiency. * **Excellent Cryogenic Properties:** Maintains strength and toughness in extremely low-temperature environments. * **Superior Fatigue Performance:** Enhanced resistance to crack propagation increases component lifespan and reliability. * **Good Weldability:** Can be successfully welded using modern techniques, such as Friction Stir Welding (FSW). **Conclusion** Aluminum Alloy 2397 is a premier material for next-generation aerospace and defense applications where minimizing weight without compromising strength, toughness, or durability is paramount. Its advanced Al-Li chemistry positions it as a critical material for pushing the boundaries of performance in modern engineering.

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 1635 gallon liquid totes Special package is available on request.