2099 Aluminum alloy,Aluminum 2099 alloy,E FORU

### **Product Datasheet: 2099 Aluminum Alloy** --- #### **1. Overview** 2099 Aluminum Alloy is a third-generation aluminum-lithium (Al-Cu-Li) alloy specifically engineered for superior damage tolerance and excellent corrosion resistance in aerospace applications. This advanced alloy offers an optimal balance of medium strength, outstanding fatigue performance, and significant weight reduction. 2099 is particularly recognized for its excellent combination of properties in extruded forms, making it ideal for complex structural components in modern aircraft where durability, weight savings, and manufacturing efficiency are critical requirements. --- #### **2. International Standards** - **UNS**: UNS A92099 - **ASTM**: ASTM B221 (Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes) - **AMS**: AMS 4334 (Aerospace Material Specification) - **AA (Aluminum Association)**: AA 2099 - **ISO**: ISO 6361-2 (Wrought Aluminum and Aluminum Alloy Sheet, Strip and Plate) --- #### **3. Chemical Composition (Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Copper (Cu)** | 2.4–3.0 | | **Lithium (Li)** | 1.6–2.0 | | **Magnesium (Mg)** | 0.25–0.8 | | **Zinc (Zn)** | 0.50–1.2 | | **Manganese (Mn)** | 0.10–0.50 | | **Zirconium (Zr)** | 0.08–0.15 | | **Iron (Fe)** | ≤ 0.10 | | **Silicon (Si)** | ≤ 0.08 | | **Titanium (Ti)** | ≤ 0.10 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- #### **4. Physical Properties** | Property | Value | |----------|-------| | **Density** | 2.63–2.65 g/cm³ (0.0950–0.0957 lb/in³) | | **Melting Range** | ~555–650°C (1030–1200°F) | | **Electrical Conductivity** | ~28–32 % IACS | | **Thermal Conductivity** | 80–100 W/m·K | | **Coefficient of Thermal Expansion** | 21.5–22.5 × 10⁻⁶/°C (20–100°C) | | **Modulus of Elasticity** | 77.5–79.5 GPa (11,250–11,550 ksi) | --- #### **5. Mechanical Properties (Typical Values - T83 Temper)** | Property | Typical Value | |----------|---------------| | **Tensile Strength (Ultimate)** | 460–510 MPa (67–74 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 400–450 MPa (58–65 ksi) | | **Elongation at Break** | 9–13% | | **Compressive Yield Strength** | 410–460 MPa (59–67 ksi) | | **Shear Strength** | 270–310 MPa (39–45 ksi) | | **Bearing Yield Strength** | 650–710 MPa (94–103 ksi) | | **Fracture Toughness (L-T方向)** | 34–40 MPa√m | | **Fatigue Crack Growth Resistance** | Excellent | --- #### **6. Key Characteristics & Advantages** - **Superior Damage Tolerance**: Exceptional fracture toughness and fatigue performance - **Significant Weight Reduction**: 7–9% lower density than conventional aluminum alloys - **Excellent Corrosion Resistance**: Outstanding resistance to stress corrosion cracking - **Good Extrudability**: Excellent performance in extruded product forms - **Balanced Properties**: Optimal combination of strength and toughness - **Reduced Anisotropy**: More uniform properties than earlier Al-Li alloys - **Manufacturing Efficiency**: Good formability and machining characteristics --- #### **7. Product Applications** - **Aircraft Extrusions**: Fuselage stringers, frames, and floor beams - **Wing Structures**: Ribs, spars, and support components - **Commercial Aircraft**: Airbus A380 and other modern airliner components - **Spacecraft Structures**: Satellite frames and support elements - **Military Applications**: Military transport aircraft structural components - **Helicopter Components**: Airframe extrusions and structural members --- #### **8. Available Forms** - Extruded Profiles and Shapes - Bars and Rods - Sheet (1.0–6.0 mm thickness) - Plate (6–80 mm thickness) - Drawn Tubes --- #### **9. Processing and Handling** - **Extrusion Characteristics**: Excellent extrudability with complex shape capability - **Heat Treatment**: Responsive to standard T8-type aging treatments - **Machining**: Good machinability with proper techniques - **Joining**: Excellent weldability using conventional methods - **Surface Protection**: Standard aerospace coating systems applicable - **Quality Assurance**: Meets rigorous aerospace quality standards --- **Disclaimer**: The information presented is typical and for reference only. Actual properties may vary with processing, size, and heat treatment. For critical applications, contact our technical service team for specific data and processing recommendations.

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 1593 gallon liquid totes Special package is available on request.