Alclad 2219-T851 Aluminum alloy,Aluminum 2219-T851 alloy,E FORU

### **Product Datasheet: Alclad 2219-T851 Aluminum Alloy** --- #### **1. Overview** Alclad 2219-T851 Aluminum Alloy is a premium high-strength aluminum-copper alloy supplied in the T851 temper (solution heat-treated, stress-relieved by stretching, and artificially aged) with a protective aluminum cladding layer. This advanced temper condition provides the optimal combination of high strength, superior stress corrosion cracking resistance, and excellent dimensional stability, making it ideal for critical aerospace structures where reliability, durability, and performance are paramount. --- #### **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 comprising 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** | ~28–32 % IACS | | **Thermal Conductivity** | 100–120 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 (T851 Temper Condition)** | Property | Typical Value | |----------|---------------| | **Tensile Strength (Ultimate)** | 440–490 MPa (64–71 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 330–380 MPa (48–55 ksi) | | **Elongation at Break** | 7–11% | | **Compressive Yield Strength** | 340–390 MPa (49–57 ksi) | | **Shear Strength** | 260–300 MPa (38–44 ksi) | | **Bearing Yield Strength** | 620–680 MPa (90–99 ksi) | | **Fracture Toughness** | 24–30 MPa√m | | **Fatigue Strength** | 160–190 MPa (23–28 ksi) | --- #### **6. Key Characteristics & Advantages** - **Premium Stress Relief**: Stretching ensures minimal residual stresses - **Optimized Artificial Aging**: T851 provides superior SCC resistance - **Maximum Corrosion Protection**: Alclad coating offers sacrificial protection - **Excellent Dimensional Stability**: Ideal for precision applications - **High Strength Maintenance**: Superior properties in thick sections - **Cryogenic Capability**: Excellent low-temperature performance - **Space-Qualified**: Proven in demanding aerospace applications --- #### **7. Product Applications** - **Space Launch Vehicles**: Primary fuel tanks and structural components - **Aircraft Primary Structures**: Wing spars and fuselage frames - **Rocket Components**: Motor cases and cryogenic tankage - **Military Aerospace**: Critical defense system components - **Satellite Structures**: Primary frames and support structures - **High-Pressure Vessels**: Cryogenic storage and pressure containers --- #### **8. Available Forms** - Plate (12–150 mm thickness) - Heavy Section Sheet (6–12 mm thickness) - Stress-Relieved Blanks - Custom Machined Components --- #### **9. Processing and Quality Assurance** - **Stress Relief**: Controlled stretching for dimensional stability - **Precision Machining**: Excellent machinability with carbide tools - **Welding Compatibility**: Suitable for high-quality weldments - **Heat Treatment**: Precise artificial aging control - **Quality Verification**: 100% ultrasonic inspection standard - **Corrosion System**: Integrated Alclad protection - **Certification**: Full aerospace qualification documentation --- **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 1617 gallon liquid totes Special package is available on request.