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

### **Product Datasheet: 2219-T851 Aluminum Alloy** --- #### **1. Overview** 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). This advanced temper condition provides the optimal combination of high strength, superior dimensional stability, and excellent stress corrosion cracking resistance. The stretching operation after solution treatment effectively minimizes residual stresses, making this alloy ideal for precision machined components and critical aerospace structures where dimensional accuracy and long-term reliability are paramount. --- #### **2. International Standards** - **UNS**: UNS A92219 - **ASTM**: ASTM B209 (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate) - **AMS**: AMS 4041 (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** | ~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 for superior dimensional stability - **Optimized Artificial Aging**: T851 provides exceptional stress corrosion cracking resistance - **High Strength Maintenance**: Superior properties maintained in thick sections - **Excellent Cryogenic Performance**: Outstanding toughness at extremely low temperatures - **Enhanced Fatigue Resistance**: Superior performance under cyclic loading conditions - **Superior Weldability**: Maintains excellent welding characteristics - **Space-Qualified Reliability**: Proven performance in demanding aerospace applications --- #### **7. Product Applications** - **Space Launch Vehicles**: Primary fuel tanks and structural components - **Aircraft Primary Structures**: Wing spars, fuselage frames, and bulkheads - **Rocket Components**: Motor cases and cryogenic tankage systems - **Satellite Structures**: Primary frames and support elements - **Military Aerospace**: Critical defense system components - **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 - Forging Stock --- #### **9. Processing and Quality Assurance** - **Precision Machining**: Excellent stability for complex machining operations - **Stress Relief Benefits**: Minimal distortion during and after machining - **Welding Compatibility**: Suitable for high-integrity weldments - **Heat Treatment**: Precise artificial aging control for optimal properties - **Quality Verification**: 100% ultrasonic inspection standard - **Dimensional Stability**: Ideal for precision components and assemblies - **Certification**: Full aerospace qualification documentation available --- **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 1627 gallon liquid totes Special package is available on request.