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

### **Product Datasheet: Alclad 2219-T81 Aluminum Alloy** --- #### **1. Overview** Alclad 2219-T81 Aluminum Alloy is a high-strength aluminum-copper alloy supplied in the T81 temper (solution heat-treated, cold worked, and artificially aged) with a protective aluminum cladding layer. This temper provides an excellent combination of high strength, good fracture toughness, and superior stress corrosion cracking resistance. The Alclad coating ensures maximum corrosion protection while the T81 aging treatment optimizes mechanical properties for critical aerospace structures requiring long-term reliability and performance. --- #### **2. International Standards** - **UNS**: UNS A92219 - **ASTM**: ASTM B209 (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate) - **AMS**: AMS 4119 (Aerospace Material Specification) - **AA (Aluminum Association)**: AA 2219 - **ISO**: ISO 6361-2 (Wrought Aluminum and Aluminum Alloy Sheet, Strip and Plate) --- #### **3. Chemical Composition** **Core Material (2219) - 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 | **Cladding Material** Pure aluminum (1XXX series) coating, typically 2.5-5% of total thickness per side. --- #### **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 - **Maximum Corrosion Protection**: Alclad coating offers sacrificial protection - **Excellent Stress Corrosion Resistance**: Superior performance in demanding environments - **High Strength-to-Weight Ratio**: Premium mechanical properties for aerospace - **Good Cryogenic Toughness**: Maintains properties at low temperatures - **Weldability**: Excellent welding characteristics maintained - **Long-Term Reliability**: Proven performance in critical applications --- #### **7. Product Applications** - **Aircraft Primary Structures**: Wing and fuselage components - **Space Launch Vehicles**: Fuel tanks and structural members - **Rocket Components**: Motor cases and cryogenic tanks - **Military Aircraft**: Critical structural components - **Marine Aerospace**: Components in corrosive environments - **Pressure Vessels**: High-pressure containers and vessels --- #### **8. Available Forms** - Plate (6–100 mm thickness) - Sheet (1.0–6.0 mm thickness) - Custom Fabricated Components - Welded Structures --- #### **9. Processing and Quality Features** - **Heat Treatment**: Precise artificial aging for optimal properties - **Machining**: Good machinability with proper techniques - **Welding**: Excellent performance with fusion welding processes - **Forming**: Limited formability in T81 temper - **Quality Control**: Comprehensive testing including ultrasonic inspection - **Corrosion Protection**: Built-in Alclad protection system - **Certification**: Full aerospace qualification and documentation --- **Disclaimer**: The information presented is typical and for reference only. Actual properties may vary with processing and specific manufacturing conditions. For critical aerospace 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 1616 gallon liquid totes Special package is available on request.