2218-T61 Aluminum alloy,Aluminum 2218-T61 alloy,E FORU

### **Product Datasheet: 2218-T61 Aluminum Alloy** --- #### **1. Overview** 2218-T61 Aluminum Alloy is a high-temperature aluminum-copper alloy supplied in the T61 temper (solution heat-treated, quenched, and artificially aged). This alloy is specifically designed for elevated temperature applications, particularly in aircraft piston engines and other components operating at high temperatures. The T61 temper provides optimal stability and strength retention at temperatures up to 300°C (570°F), making it suitable for components exposed to thermal cycling and sustained heat. --- #### **2. International Standards** - **UNS**: UNS A92218 - **ASTM**: ASTM B211 (Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod, and Wire) - **AMS**: AMS 4125 (Aerospace Material Specification) - **AA (Aluminum Association)**: AA 2218 - **ISO**: ISO 6362 (Wrought Aluminum and Aluminum Alloy Extruded Rod/Bar, Tube, and Profiles) --- #### **3. Chemical Composition (Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Copper (Cu)** | 3.5–4.5 | | **Magnesium (Mg)** | 1.2–1.8 | | **Iron (Fe)** | 0.9–1.3 | | **Silicon (Si)** | 0.9–1.2 | | **Nickel (Ni)** | 1.7–2.3 | | **Zinc (Zn)** | ≤ 0.25 | | **Manganese (Mn)** | ≤ 0.20 | | **Chromium (Cr)** | ≤ 0.10 | | **Titanium (Ti)** | ≤ 0.20 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- #### **4. Physical Properties** | Property | Value | |----------|-------| | **Density** | 2.81–2.83 g/cm³ (0.1015–0.1022 lb/in³) | | **Melting Range** | ~530–640°C (985–1185°F) | | **Electrical Conductivity** | ~35–40 % IACS | | **Thermal Conductivity** | 120–140 W/m·K | | **Coefficient of Thermal Expansion** | 22.0–23.0 × 10⁻⁶/°C (20–100°C) | | **Modulus of Elasticity** | 72.0–74.0 GPa (10,450–10,750 ksi) | --- #### **5. Mechanical Properties (T61 Temper Condition)** | Property | Room Temperature | 200°C (390°F) | 300°C (570°F) | |----------|------------------|----------------|----------------| | **Tensile Strength (Ultimate)** | 380–430 MPa | 280–330 MPa | 180–230 MPa | | **Tensile Yield Strength** | 270–320 MPa | 200–250 MPa | 130–180 MPa | | **Elongation at Break** | 8–12% | 10–15% | 15–20% | | **Shear Strength** | 220–260 MPa | 160–200 MPa | 100–140 MPa | | **Hardness (Brinell)** | 105–125 HB | 80–100 HB | 50–70 HB | --- #### **6. Key Characteristics & Advantages** - **Excellent High-Temperature Stability**: Maintains strength at elevated temperatures - **Good Thermal Fatigue Resistance**: Suitable for thermal cycling applications - **Wear Resistance**: Good resistance to abrasion and galling - **Machinability**: Good machining characteristics in heat-treated condition - **Nickel Addition**: Enhances high-temperature strength and stability - **Dimensional Stability**: Low thermal expansion coefficient - **Proven Performance**: Long history in aircraft engine applications --- #### **7. Product Applications** - **Aircraft Piston Engines**: Cylinder heads, crankcases, and pistons - **Automotive Racing**: High-performance engine components - **Industrial Equipment**: High-temperature machinery parts - **Pump Components**: Impellers and housings for hot fluids - **Die Casting Tools**: Molds and dies for non-ferrous metals - **Military Applications**: Engine components for military vehicles --- #### **8. Available Forms** - Forging Stock - Bar and Rod - Die Forgings - Castings (for specific applications) - Custom Machined Components --- #### **9. Processing and Heat Treatment** - **Solution Treatment**: Typically 495–505°C (925–940°F) - **Aging Treatment**: Artificial aging to achieve T61 properties - **Machining**: Best machined in heat-treated condition - **Joining**: Can be welded with proper precautions - **Heat Exposure**: Designed for prolonged exposure to 200–300°C - **Quality Control**: Rigorous testing for high-temperature applications --- **Disclaimer**: The information presented is typical and for reference only. Actual properties may vary with processing and specific service conditions. For high-temperature 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 1608 gallon liquid totes Special package is available on request.