2091-T8x, 10% cold work Aluminum alloy,Aluminum 2091-T8x, 10% cold work alloy,E FORU

### **Product Datasheet: 2091-T8x Aluminum Alloy (10% Cold Worked Condition)** --- #### **1. Overview** 2091-T8x Aluminum Alloy in the 10% cold worked condition represents a specially processed variant of this second-generation aluminum-lithium alloy. The controlled cold working operation after solution heat treatment and before artificial aging enhances strength properties through work hardening while maintaining the alloy's inherent advantages of low density and improved corrosion resistance. This specific processing route is designed for applications requiring elevated strength levels with maintained damage tolerance characteristics. --- #### **2. International Standards** - **UNS**: UNS A92091 - **ASTM**: ASTM B209 (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate) - **AMS**: AMS 4259 (Aerospace Material Specification) - **AA (Aluminum Association)**: AA 2091 - **ISO**: ISO 6361-2 (Wrought Aluminum and Aluminum Alloy Sheet, Strip and Plate) --- #### **3. Chemical Composition (Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Copper (Cu)** | 1.8–2.5 | | **Lithium (Li)** | 1.7–2.3 | | **Magnesium (Mg)** | 1.1–1.6 | | **Zirconium (Zr)** | 0.08–0.15 | | **Iron (Fe)** | ≤ 0.12 | | **Silicon (Si)** | ≤ 0.10 | | **Manganese (Mn)** | ≤ 0.10 | | **Zinc (Zn)** | ≤ 0.10 | | **Titanium (Ti)** | ≤ 0.10 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- #### **4. Physical Properties** | Property | Value | |----------|-------| | **Density** | 2.57–2.59 g/cm³ (0.0928–0.0935 lb/in³) | | **Melting Range** | ~560–650°C (1040–1200°F) | | **Electrical Conductivity** | ~22–26 % IACS | | **Thermal Conductivity** | 65–85 W/m·K | | **Coefficient of Thermal Expansion** | 20.5–21.5 × 10⁻⁶/°C (20–100°C) | | **Modulus of Elasticity** | 77.0–79.0 GPa (11,200–11,500 ksi) | | **Residual Stress Level** | Moderate (controlled by thermal treatment) | --- #### **5. Mechanical Properties (10% Cold Worked + T8x Aging)** | Property | T81 Condition | T83 Condition | T85 Condition | |----------|---------------|---------------|---------------| | **Tensile Strength (Ultimate)** | 460–510 MPa | 490–540 MPa | 520–570 MPa | | **Tensile Yield Strength** | 380–430 MPa | 430–480 MPa | 480–530 MPa | | **Elongation at Break** | 7–10% | 6–9% | 4–7% | | **Compressive Yield Strength** | 390–440 MPa | 440–490 MPa | 490–540 MPa | | **Shear Strength** | 270–310 MPa | 290–330 MPa | 310–350 MPa | | **Fracture Toughness** | 28–34 MPa√m | 24–30 MPa√m | 20–26 MPa√m | --- #### **6. Key Characteristics & Advantages** - **Enhanced Strength**: 10% cold work increases strength by 5–8% over conventional T8x - **Controlled Work Hardening**: Precise 10% reduction ensures consistent properties - **Improved Fatigue Performance**: Cold working enhances fatigue resistance - **Weight Advantage**: Maintains 8–10% density reduction vs conventional alloys - **Good Anisotropy Control**: Better property uniformity than first-generation alloys - **Optimized Aging Response**: Cold work accelerates and enhances precipitation hardening - **Residual Stress Management**: Controlled thermal treatment minimizes detrimental stresses --- #### **7. Product Applications** - **Aircraft Structural Components**: Highly stressed fuselage and wing elements - **Aerospace Fasteners**: High-strength rivets and structural fasteners - **Helicopter Components**: Rotor hub components and dynamic parts - **Space Vehicle Structures**: High-stress launch vehicle components - **Military Hardware**: Lightweight armor components and structural elements - **High-Performance Automotive**: Racing suspension and chassis components --- #### **8. Available Forms** - Sheet (1.0–6.0 mm thickness) - Plate (6–50 mm thickness) - Rolled Bar and Rod Stock - Custom Cold Worked Profiles --- #### **9. Special Processing Considerations** - **Cold Work Control**: Precise 10% reduction measurement and verification required - **Aging Optimization**: Artificial aging parameters adjusted for cold worked condition - **Springback Compensation**: Design must account for cold work effects - **Machining Adjustments**: Modified parameters needed for work-hardened material - **Joining Techniques**: Special considerations for welded and bonded joints - **Stress Relief**: May require stress relief after severe machining operations - **Quality Verification**: Enhanced testing for cold work uniformity and property consistency --- **Disclaimer**: The information presented is typical and for reference only. Actual properties may vary with processing parameters, specific aging conditions, and cold work uniformity. 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 1587 gallon liquid totes Special package is available on request.