2090-T84 Aluminum alloy,Aluminum 2090-T84 alloy,E FORU

### **Product Datasheet: 2090-T84 Aluminum Alloy** --- #### **1. Overview** 2090-T84 Aluminum Alloy is a first-generation aluminum-lithium (Al-Cu-Li) alloy supplied in the T84 temper (solution heat-treated, cold worked, and artificially aged to a specific strength level). This temper condition offers a balanced combination of high strength, good damage tolerance, and excellent cryogenic properties, making it particularly suitable for aerospace applications where weight reduction and performance at low temperatures are critical requirements. --- #### **2. International Standards** - **UNS**: UNS A92090 - **ASTM**: ASTM B209 (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate) - **AMS**: AMS 4256 (Aerospace Material Specification) - **AA (Aluminum Association)**: AA 2090 - **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)** | 1.9–2.6 | | **Zirconium (Zr)** | 0.08–0.15 | | **Iron (Fe)** | ≤ 0.12 | | **Silicon (Si)** | ≤ 0.10 | | **Manganese (Mn)** | ≤ 0.05 | | **Magnesium (Mg)** | ≤ 0.05 | | **Zinc (Zn)** | ≤ 0.10 | | **Titanium (Ti)** | ≤ 0.15 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- #### **4. Physical Properties** | Property | Value | |----------|-------| | **Density** | 2.59–2.61 g/cm³ (0.0935–0.0942 lb/in³) | | **Melting Range** | ~570–660°C (1060–1220°F) | | **Electrical Conductivity** | ~22–26 % IACS | | **Thermal Conductivity** | 65–85 W/m·K | | **Coefficient of Thermal Expansion** | 21.0–22.0 × 10⁻⁶/°C (20–100°C) | | **Modulus of Elasticity** | 77.0–79.0 GPa (11,200–11,500 ksi) | --- #### **5. Mechanical Properties (T84 Temper Condition)** | Property | Typical Value | |----------|---------------| | **Tensile Strength (Ultimate)** | 460–510 MPa (67–74 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 410–460 MPa (59–67 ksi) | | **Elongation at Break** | 7–12% | | **Compressive Yield Strength** | 420–470 MPa (61–68 ksi) | | **Shear Strength** | 270–310 MPa (39–45 ksi) | | **Bearing Yield Strength** | 650–710 MPa (94–103 ksi) | | **Fracture Toughness (L-T方向)** | 26–33 MPa√m | | **Fatigue Strength** | 140–170 MPa (10⁷ cycles) | --- #### **6. Key Characteristics & Advantages** - **Optimized Strength-Toughness Balance**: Carefully controlled aging for optimal performance - **Significant Weight Reduction**: 8–10% lower density than conventional aluminum alloys - **Enhanced Stiffness**: 10–12% higher modulus than traditional aluminum alloys - **Excellent Cryogenic Properties**: Superior performance at low temperatures - **Good Fatigue Resistance**: Suitable for cyclic loading applications - **Anisotropic Nature**: Properties vary with material orientation - **Controlled Aging**: Specific artificial aging parameters for consistent properties --- #### **7. Product Applications** - **Aircraft Structures**: Wing skins and fuselage panels - **Space Applications**: Cryogenic tank components and space structures - **Military Aircraft**: Weight-sensitive structural components - **Satellite Systems**: Structural frames and support elements - **Launch Vehicles**: Liquid fuel tank components - **Helicopter Components**: Rotor blades and airframe structures --- #### **8. Available Forms** - Sheet (0.5–6.0 mm thickness) - Plate (6–50 mm thickness) - Extruded Profiles - Drawn Tubes and Bars --- #### **9. Processing and Handling** - **Forming**: Limited formability in T84 temper; best formed in annealed condition - **Machining**: Requires appropriate techniques due to lithium content - **Heat Treatment**: Sensitive to aging parameters; strict process control essential - **Joining**: Weldable with proper procedures; may require post-weld heat treatment - **Anisotropy Consideration**: Design must account for directional properties - **Corrosion Protection**: Requires appropriate surface protection systems - **Cryogenic Suitability**: Excellent for applications down to -250°C --- **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 1584 gallon liquid totes Special package is available on request.