2219-T81 Aluminum alloy,Aluminum 2219-T81 alloy,E FORU

### **Product Datasheet: 2219-T81 Aluminum Alloy** --- #### **1. Overview** 2219-T81 Aluminum Alloy is a high-strength aluminum-copper alloy supplied in the T81 temper (solution heat-treated, cold worked, and artificially aged). This temper condition provides an excellent combination of high strength, superior stress corrosion cracking resistance, and good fracture toughness. The specific thermomechanical processing results in optimized mechanical properties for critical aerospace applications requiring maximum performance in demanding environments, including cryogenic service. --- #### **2. International Standards** - **UNS**: UNS A92219 - **ASTM**: ASTM B209 (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate) - **AMS**: AMS 4040 (Aerospace Material Specification) - **AA (Aluminum Association)**: AA 2219 - **ISO**: ISO 6361-2 (Wrought Aluminum and Aluminum Alloy Sheet, Strip and Plate) --- #### **3. Chemical Composition (Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Copper (Cu)** | 5.8–6.8 | | **Manganese (Mn)** | 0.20–0.40 | | **Vanadium (V)** | 0.05–0.15 | | **Zirconium (Zr)** | 0.10–0.25 | | **Iron (Fe)** | ≤ 0.30 | | **Silicon (Si)** | ≤ 0.20 | | **Zinc (Zn)** | ≤ 0.10 | | **Titanium (Ti)** | 0.02–0.10 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- #### **4. Physical Properties** | Property | Value | |----------|-------| | **Density** | 2.77–2.79 g/cm³ (0.100–0.101 lb/in³) | | **Melting Range** | ~540–650°C (1000–1200°F) | | **Electrical Conductivity** | ~30–34 % IACS | | **Thermal Conductivity** | 105–125 W/m·K | | **Coefficient of Thermal Expansion** | 22.3–23.3 × 10⁻⁶/°C (20–100°C) | | **Modulus of Elasticity** | 72.0–74.0 GPa (10,450–10,750 ksi) | --- #### **5. Mechanical Properties (T81 Temper Condition)** | Property | Typical Value | |----------|---------------| | **Tensile Strength (Ultimate)** | 420–470 MPa (61–68 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 290–340 MPa (42–49 ksi) | | **Elongation at Break** | 8–12% | | **Compressive Yield Strength** | 300–350 MPa (44–51 ksi) | | **Shear Strength** | 250–290 MPa (36–42 ksi) | | **Bearing Yield Strength** | 580–640 MPa (84–93 ksi) | | **Fracture Toughness** | 26–32 MPa√m | | **Fatigue Strength** | 150–180 MPa (22–26 ksi) | --- #### **6. Key Characteristics & Advantages** - **Optimized Aging Treatment**: T81 temper provides superior strength-toughness balance - **Excellent Stress Corrosion Resistance**: Enhanced performance in demanding environments - **Superior Cryogenic Properties**: Maintains exceptional toughness at low temperatures - **Controlled Cold Working**: Specific thermomechanical processing for consistent properties - **High Strength-to-Weight Ratio**: Premium mechanical properties for aerospace applications - **Good Weldability**: Maintains welding characteristics despite high strength - **Thermal Stability**: Reliable performance across temperature extremes --- #### **7. Product Applications** - **Space Launch Vehicles**: Primary fuel tanks and cryogenic containers - **Aircraft Primary Structures**: Wing and fuselage components - **Rocket Motor Cases**: High-pressure containment systems - **Missile Structures**: Airframe and propulsion system components - **Cryogenic Storage**: Liquid hydrogen and oxygen tanks - **Military Aerospace**: Critical defense system components --- #### **8. Available Forms** - Plate (6–100 mm thickness) - Sheet (1.0–6.0 mm thickness) - Extruded Profiles - Forging Stock - Custom Machined Components --- #### **9. Processing and Quality Assurance** - **Machining**: Good machinability with carbide tooling recommended - **Forming**: Limited formability in T81 temper - **Welding**: Excellent performance with proper procedures - **Heat Treatment**: Precise artificial aging control for optimal properties - **Quality Control**: 100% ultrasonic inspection for critical applications - **Certification**: Full aerospace qualification and documentation - **Testing**: Comprehensive mechanical and metallurgical testing --- **Disclaimer**: The information presented is typical and for reference only. Actual properties may vary with processing and specific manufacturing conditions. For critical aerospace and space applications, contact our technical service team for specific data and certification requirements.

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 1626 gallon liquid totes Special package is available on request.