2090-O Aluminum alloy,Aluminum 2090-O alloy,E FORU

### **Product Datasheet: 2090-O Aluminum Alloy** --- #### **1. Overview** 2090-O Aluminum Alloy is a first-generation aluminum-lithium (Al-Li) alloy supplied in the annealed (O) temper condition. This heat-treatable Al-Cu-Li alloy was developed primarily for weight-critical aerospace applications, offering significant density reduction compared to conventional aluminum alloys. The O temper provides maximum formability and workability, making 2090-O ideal for complex forming operations before subsequent heat treatment to higher strength tempers. --- #### **2. International Standards** - **UNS**: UNS A92090 - **ASTM**: ASTM B209 (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate) - **AMS**: AMS 4253 (Aerospace Material Specification) - **AA (Aluminum Association)**: AA 2090 - **ISO**: ISO 6361 (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 (O Temper Condition)** | Property | Typical Value | |----------|---------------| | **Tensile Strength (Ultimate)** | 170–220 MPa (25–32 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 70–120 MPa (10–17 ksi) | | **Elongation at Break** | 14–20% | | **Shear Strength** | 110–150 MPa (16–22 ksi) | | **Hardness (Brinell)** | 45–65 HB | | **Bearing Yield Strength** | 100–140 MPa (15–20 ksi) | --- #### **6. Key Characteristics & Advantages** - **Maximum Weight Reduction**: 8–10% lower density than conventional aluminum alloys - **Excellent Formability**: Superior malleability in O temper for complex shaping - **High Stiffness**: 10–12% higher modulus than traditional aluminum alloys - **Age Hardenable**: Can be heat treated to T8 temper for high strength - **Good Corrosion Resistance**: Better than many 2xxx series alloys in aged condition - **Anisotropy Consideration**: Exhibits some directional properties in aged tempers --- #### **7. Product Applications** - **Aerospace Components**: Formed parts requiring subsequent heat treatment - **Cryogenic Applications**: Suitable for low-temperature service - **Aircraft Structures**: Components where weight savings are critical - **Space Vehicle Components**: Weight-sensitive spacecraft structures - **Prototype Development**: Forming trials and manufacturing process development --- #### **8. Available Forms** - Sheet (0.5–6.0 mm thickness) - Plate (6–50 mm thickness) - Extruded Profiles - Drawn or Seamless Tubes --- #### **9. Processing Notes** - **Forming**: Best formability in O temper; complex shapes should be formed before aging - **Heat Treatment**: Typically aged to T8 temper (solution heat treated, cold worked, artificially aged) for final properties - **Machining**: Good machinability in O temper; better in aged conditions - **Joining**: Can be welded using conventional methods; properties restored by post-weld heat treatment --- **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 1581 gallon liquid totes Special package is available on request.