2055 Aluminum alloy,Aluminum 2055 alloy,E FORU

### **Product Datasheet: 2055 Aluminum Alloy** --- #### **1. Overview** 2055 Aluminum Alloy is a advanced-generation aluminum-lithium (Al-Li) alloy developed for superior strength-to-weight ratio in aerospace applications. As one of the most advanced Al-Cu-Li alloys available, it offers an exceptional combination of high strength, low density, and excellent damage tolerance. The alloy represents a significant step forward in lightweight structural materials, providing approximately 10-12% density reduction compared to conventional high-strength aluminum alloys while maintaining superior mechanical performance. --- #### **2. International Standards** - **UNS**: UNS A92055 - **ASTM**: ASTM B831 (Standard Specification for Aluminum-Alloy Sheet and Plate) - **AMS**: AMS 4418 (Aerospace Material Specification) - **AA (Aluminum Association)**: AA 2055 - **Boeing**: BMS 7-324 (Material Specification) - **Airbus**: ABP 1-2410 (Material Specification) --- #### **3. Chemical Composition (Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Copper (Cu)** | 3.4–4.2 | | **Lithium (Li)** | 1.0–1.4 | | **Magnesium (Mg)** | 0.20–0.50 | | **Silver (Ag)** | 0.25–0.60 | | **Zinc (Zn)** | 0.30–0.70 | | **Manganese (Mn)** | 0.10–0.50 | | **Zirconium (Zr)** | 0.05–0.15 | | **Iron (Fe)** | ≤ 0.10 | | **Silicon (Si)** | ≤ 0.06 | | **Titanium (Ti)** | ≤ 0.10 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- #### **4. Physical Properties** | Property | Value | |----------|-------| | **Density** | 2.65–2.68 g/cm³ (0.0957–0.0968 lb/in³) | | **Melting Range** | ~550–640°C (1020–1185°F) | | **Electrical Conductivity** | ~30–34 % IACS | | **Thermal Conductivity** | 95–115 W/m·K | | **Coefficient of Thermal Expansion** | 21.5–22.5 × 10⁻⁶/°C (20–100°C) | | **Modulus of Elasticity** | 78.0–80.0 GPa (11,300–11,600 ksi) | --- #### **5. Mechanical Properties (Typical Values - T84 Temper)** | Property | Typical Value | |----------|---------------| | **Tensile Strength (Ultimate)** | 580–630 MPa (84–91 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 540–590 MPa (78–86 ksi) | | **Elongation at Break** | 6–10% | | **Compressive Yield Strength** | 550–600 MPa (80–87 ksi) | | **Shear Strength** | 340–380 MPa (49–55 ksi) | | **Bearing Yield Strength** | 850–950 MPa (123–138 ksi) | | **Fracture Toughness (K_IC)** | 28–34 MPa√m | --- #### **6. Key Characteristics & Advantages** - **Exceptional Strength-to-Weight Ratio**: Highest among commercial Al-Li alloys - **Significant Weight Savings**: 10-12% density reduction versus conventional alloys - **Enhanced Stiffness**: 8-10% higher modulus than traditional aluminum alloys - **Superior Fatigue Performance**: Excellent resistance to crack propagation - **Good Damage Tolerance**: Balanced strength and fracture toughness - **Corrosion Resistance**: Improved stress corrosion cracking resistance - **Weldability**: Excellent performance with friction stir welding - **Thermal Stability**: Maintains properties at elevated temperatures --- #### **7. Product Applications** - **Aircraft Structures**: Upper wing skins, fuselage stringers, and frames - **Space Launch Systems**: Rocket fuel tanks and structural components - **Military Aviation**: Fighter aircraft wings and empennage components - **Commercial Aircraft**: Boeing 777X and other next-generation airliners - **High-Performance Applications**: Racing components and specialized structures --- #### **8. Available Forms** - Plate (up to 150 mm thickness) - Sheet and Thin Plate - Extruded Profiles - Forgings --- **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 1575 gallon liquid totes Special package is available on request.