Alclad 2219-T31 Aluminum alloy,Aluminum 2219-T31 alloy,E FORU

### **Product Datasheet: Alclad 2219-T31 Aluminum Alloy** --- #### **1. Overview** Alclad 2219-T31 Aluminum Alloy is a high-strength aluminum-copper alloy supplied in the T31 temper (solution heat-treated, cold worked, and naturally aged) with a protective aluminum cladding layer. This combination provides an optimal balance of medium strength, good formability, and superior corrosion resistance. The Alclad coating offers sacrificial protection while the 2219-T31 core delivers excellent weldability and mechanical properties, making it ideal for aerospace structures requiring both performance and durability. --- #### **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 providing cathodic protection, typically 2.5-5% 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** | ~36–40 % IACS | | **Thermal Conductivity** | 120–140 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 (T31 Temper Condition)** | Property | Typical Value | |----------|---------------| | **Tensile Strength (Ultimate)** | 290–340 MPa (42–49 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 170–220 MPa (25–32 ksi) | | **Elongation at Break** | 12–18% | | **Compressive Yield Strength** | 180–230 MPa (26–33 ksi) | | **Shear Strength** | 190–230 MPa (28–33 ksi) | | **Bearing Yield Strength** | 350–410 MPa (51–59 ksi) | | **Hardness (Brinell)** | 75–95 HB | | **Fatigue Strength** | 110–140 MPa (16–20 ksi) | --- #### **6. Key Characteristics & Advantages** - **Sacrificial Corrosion Protection**: Alclad coating protects core material - **Good Formability**: Suitable for moderate forming operations - **Natural Aging**: Continues to develop strength after fabrication - **Excellent Weldability**: Maintains properties in welded structures - **Cryogenic Toughness**: Performs well at low temperatures - **Stress Corrosion Resistance**: Good resistance to stress corrosion cracking - **Aerospace Proven**: Extensive use in aircraft and spacecraft applications --- #### **7. Product Applications** - **Aircraft Fuselage Skins**: Structural skin panels requiring corrosion protection - **Spacecraft Structures**: Fuel tanks and cryogenic components - **Wing Panels**: Aircraft wing surfaces and control surfaces - **Marine Aerospace**: Components exposed to marine environments - **Military Aircraft**: External surfaces requiring durability - **Rocket Components**: Launch vehicle structures and fuel tanks --- #### **8. Available Forms** - Sheet (0.5–6.0 mm thickness) - Plate (6–25 mm thickness) - Custom Formed Panels - Welded Assemblies --- #### **9. Processing and Quality Features** - **Forming Operations**: Suitable for moderate bending and shaping - **Welding**: Excellent weldability with various processes - **Heat Treatment**: Can be further aged to higher strength tempers - **Machining**: Good machinability with proper techniques - **Corrosion Protection**: Built-in protection reduces maintenance needs - **Quality Assurance**: Meets aerospace quality standards - **Clad Integrity**: Strict control of clad thickness and bonding --- **Disclaimer**: The information presented is typical and for reference only. Actual properties may vary with processing and natural aging conditions. For critical aerospace 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 1612 gallon liquid totes Special package is available on request.