2090-T83 Aluminum alloy,Aluminum 2090-T83 alloy,E FORU

### **Product Datasheet: 2090-T83 Aluminum Alloy** --- #### **1. Overview** 2090-T83 Aluminum Alloy is a first-generation aluminum-lithium (Al-Cu-Li) alloy supplied in the T83 temper (solution heat-treated, cold worked, and artificially aged to a specific strength level). This temper provides an optimal balance of high strength, good fatigue resistance, and moderate fracture toughness while maintaining the significant weight reduction advantages of aluminum-lithium technology. The T83 condition is particularly valued for applications requiring high specific strength and excellent cryogenic properties. --- #### **2. International Standards** - **UNS**: UNS A92090 - **ASTM**: ASTM B209 (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate) - **AMS**: AMS 4255 (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** | ~20–24 % IACS | | **Thermal Conductivity** | 60–80 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 (T83 Temper Condition)** | 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** | 6–10% | | **Compressive Yield Strength** | 450–500 MPa (65–73 ksi) | | **Shear Strength** | 290–330 MPa (42–48 ksi) | | **Bearing Yield Strength** | 690–750 MPa (100–109 ksi) | | **Fracture Toughness (L-T方向)** | 24–30 MPa√m | | **Fatigue Strength** | 150–180 MPa (10⁷ cycles) | --- #### **6. Key Characteristics & Advantages** - **High Strength-to-Weight Ratio**: 8–10% density reduction with high strength - **Enhanced Stiffness**: 10–12% higher modulus than conventional aluminum alloys - **Excellent Cryogenic Properties**: Improved toughness at low temperatures - **Good Fatigue Resistance**: Suitable for cyclic loading applications - **Anisotropic Behavior**: Mechanical properties vary with orientation - **Age Hardened**: Artificially aged to optimize strength-toughness balance - **Cryogenic Performance**: Maintains excellent properties down to -250°C --- #### **7. Product Applications** - **Aircraft Primary Structures**: Wing and fuselage components - **Space Launch Vehicles**: Cryogenic fuel tanks and structures - **Military Aircraft**: Weight-critical structural components - **Satellite Structures**: Spaceframe components and supports - **Cryogenic Storage**: Liquid hydrogen and oxygen tanks - **Helicopter Components**: Main rotor components and airframe structures --- #### **8. Available Forms** - Sheet (0.5–6.0 mm thickness) - Plate (6–75 mm thickness) - Extruded Profiles and Bars - Forging Stock --- #### **9. Special Considerations** - **Anisotropy Management**: Requires careful consideration of grain direction in design - **Corrosion Protection**: Needs appropriate protective coatings - **Machining**: Requires specialized techniques due to lithium content - **Heat Treatment**: Sensitive to aging parameters; strict process control required - **Joining**: Weldable with proper procedures; may require post-weld heat treatment - **Cryogenic Application**: Particularly suited for low-temperature service --- **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 1583 gallon liquid totes Special package is available on request.