2198 Aluminum alloy,Aluminum 2198 alloy,E FORU

### **Product Datasheet: 2198 Aluminum Alloy** --- #### **1. Overview** 2198 Aluminum Alloy is a third-generation aluminum-lithium (Al-Cu-Li) alloy specifically developed for advanced aerospace applications requiring an optimal balance of medium to high strength, excellent damage tolerance, and superior corrosion resistance. This alloy represents significant improvements in manufacturing characteristics and property consistency compared to earlier aluminum-lithium alloys, making it particularly suitable for fuselage and wing skin applications in next-generation aircraft where weight reduction and durability are critical. --- #### **2. International Standards** - **UNS**: UNS A92198 - **ASTM**: ASTM B209 (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate) - **AMS**: AMS 4416 (Aerospace Material Specification) - **AA (Aluminum Association)**: AA 2198 - **ISO**: ISO 6361-2 (Wrought Aluminum and Aluminum Alloy Sheet, Strip and Plate) --- #### **3. Chemical Composition (Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Copper (Cu)** | 2.9–3.5 | | **Lithium (Li)** | 0.8–1.1 | | **Magnesium (Mg)** | 0.25–0.8 | | **Silver (Ag)** | 0.25–0.60 | | **Zirconium (Zr)** | 0.08–0.15 | | **Manganese (Mn)** | 0.10–0.50 | | **Zinc (Zn)** | ≤ 0.25 | | **Iron (Fe)** | ≤ 0.12 | | **Silicon (Si)** | ≤ 0.10 | | **Titanium (Ti)** | ≤ 0.10 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- #### **4. Physical Properties** | Property | Value | |----------|-------| | **Density** | 2.69–2.71 g/cm³ (0.0971–0.0979 lb/in³) | | **Melting Range** | ~545–645°C (1010–1190°F) | | **Electrical Conductivity** | ~32–36 % IACS | | **Thermal Conductivity** | 100–120 W/m·K | | **Coefficient of Thermal Expansion** | 22.2–23.2 × 10⁻⁶/°C (20–100°C) | | **Modulus of Elasticity** | 77.0–79.0 GPa (11,200–11,500 ksi) | --- #### **5. Mechanical Properties (Typical Values - T8 Temper)** | Property | Typical Value | |----------|---------------| | **Tensile Strength (Ultimate)** | 490–540 MPa (71–78 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 440–490 MPa (64–71 ksi) | | **Elongation at Break** | 9–13% | | **Compressive Yield Strength** | 450–500 MPa (65–73 ksi) | | **Shear Strength** | 290–330 MPa (42–48 ksi) | | **Bearing Yield Strength** | 720–780 MPa (104–113 ksi) | | **Fracture Toughness (L-T方向)** | 31–37 MPa√m | | **Fatigue Strength** | 160–190 MPa (23–28 ksi) | --- #### **6. Key Characteristics & Advantages** - **Optimized Property Balance**: Excellent combination of strength and damage tolerance - **Weight Reduction**: 5–7% lower density than conventional aluminum alloys - **Enhanced Corrosion Resistance**: Superior to earlier aluminum-lithium alloys - **Improved Manufacturing Characteristics**: Better formability and machining - **Reduced Anisotropy**: More uniform properties in different directions - **Good Thermal Stability**: Maintains properties at elevated temperatures - **Weldability**: Suitable for modern joining techniques including FSW --- #### **7. Product Applications** - **Aircraft Fuselage Skins**: Upper and lower fuselage panels - **Wing Structures**: Wing skins and stringers - **Commercial Aircraft**: Next-generation airliner structures - **Military Applications**: Military aircraft structural components - **Spacecraft Components**: Satellite structures and support frames - **Helicopter Structures**: Airframe components and panels --- #### **8. Available Forms** - Sheet (0.8–8.0 mm thickness) - Plate (8–100 mm thickness) - Extruded Profiles - Custom Formed Parts --- #### **9. Processing and Quality Assurance** - **Heat Treatment**: Responsive to artificial aging with good process window - **Forming Operations**: Good formability in solution heat-treated condition - **Machining**: Standard aluminum machining techniques applicable - **Joining**: Excellent for friction stir welding and conventional methods - **Surface Protection**: Compatible with aerospace coating systems - **Quality Control**: Stringent testing for aerospace certification - **Documentation**: Full traceability and material certification --- **Disclaimer**: The information presented is typical and for reference only. Actual properties may vary with processing, size, and heat treatment. For critical aerospace 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 1605 gallon liquid totes Special package is available on request.