Alloy PE11,Nimonic PE11,,E FORU

### **Alloy PE11 / Nimonic® PE11** **Precipitation-Hardenable Nickel-Chromium Superalloy for High-Temperature Service** #### **1. Overview** **Alloy PE11**, commercially known as **Nimonic® PE11**, is a precipitation-hardenable nickel-chromium superalloy developed for applications requiring good high-temperature strength and excellent oxidation resistance. This alloy represents an important class of materials that combine moderate strength with good fabricability, making it suitable for both rotating and static components in gas turbine engines. Nimonic PE11 maintains reliable performance at temperatures up to 750°C (1382°F) and offers a favorable balance between mechanical properties and manufacturing characteristics. #### **2. Chemical Composition (Weight %)** The typical chemical composition of Nimonic PE11 is outlined below. The balance is Nickel (Ni). | Element | Content (%) | Key Function | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | Forms the austenitic matrix and provides fundamental high-temperature strength and stability. | | **Chromium (Cr)** | 17.0 - 21.0 | Provides oxidation and corrosion resistance at elevated temperatures. | | **Titanium (Ti)** | 2.0 - 3.0 | Primary precipitation hardening element forming γ' phase (Ni₃Ti). | | **Aluminum (Al)** | 0.8 - 1.5 | Co-precipitates with titanium to form γ' phase (Ni₃(Al,Ti)). | | **Cobalt (Co)** | 1.5 max | Enhances solid-solution strengthening. | | **Iron (Fe)** | 1.5 max | Controlled impurity; kept low to maintain high-temperature properties. | | **Manganese (Mn)** | 1.0 max | Improves hot workability. | | **Silicon (Si)** | 1.0 max | Enhances oxidation resistance. | | **Copper (Cu)** | 0.5 max | Controlled impurity. | | **Carbon (C)** | 0.08 - 0.15 | Forms carbides for grain boundary strengthening. | | **Boron (B)** | 0.005 - 0.015 | Enhances creep strength and grain boundary cohesion. | | **Zirconium (Zr)** | 0.02 - 0.10 | Improves creep-rupture properties. | | **Sulfur (S)** | 0.015 max | Impurity, kept low to prevent hot shortness. | #### **3. Physical Properties** | Property | Value / Condition | | :--- | :--- | | **Density** | 8.15 g/cm³ (0.294 lb/in³) | | **Melting Range** | ~ 1360 - 1410 °C (2480 - 2570 °F) | | **Mean Coefficient of Thermal Expansion** | 20 - 500°C (68 - 932°F): **14.2 x 10⁻⁶/°C** (7.9 x 10⁻⁶/°F)
20 - 800°C (68 - 1472°F): **15.3 x 10⁻⁶/°C** (8.5 x 10⁻⁶/°F) | | **Thermal Conductivity** | 16.8 W/m·K (116 Btu·in/hr·ft²·°F) at 20°C (68°F)
25.2 W/m·K (175 Btu·in/hr·ft²·°F) at 800°C (1472°F) | | **Specific Heat** | 445 J/kg·K (0.106 Btu/lb·°F) at 20°C (68°F) | | **Electrical Resistivity** | 1.22 μΩ·m at 20°C (68°F) | | **Modulus of Elasticity (Young's Modulus)** | 218 GPa (31.6 x 10⁶ psi) at 20°C (68°F) | | **Magnetic Permeability** | Essentially non-magnetic. | #### **4. Mechanical Properties (Typical for Aged Condition)** | Property | At Room Temperature | At 650°C (1202°F) | At 750°C (1382°F) | | :--- | :--- | :--- | :--- | | **Tensile Strength** | 900 - 1100 MPa (131 - 160 ksi) | ~600 MPa (87 ksi) | ~450 MPa (65 ksi) | | **Yield Strength (0.2% Offset)** | 600 - 750 MPa (87 - 109 ksi) | ~500 MPa (73 ksi) | ~380 MPa (55 ksi) | | **Elongation (in 50 mm / 2 in)** | 15% - 25% | 12% - 20% | 15% - 25% | | **Reduction of Area** | 20% - 35% | 18% - 30% | 20% - 35% | | **Hardness (Rockwell C)** | 28 - 35 HRC | - | - | #### **5. International Standards** Nimonic PE11 is covered by several international and industry-specific standards: * **ASTM:** * **B 637:** Standard Specification for Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock for High-Temperature Service * **AMS:** * **AMS 5546:** Sheet, Strip, and Plate * **AMS 5698:** Wire for Springs * **BS / EN:** * **BS HR 502:** Aerospace series * **EN 10095:** Heat resisting steels and nickel alloys * **DIN:** 2.4952 (Material Number) * **ISO:** ISO 9723, ISO 9724 * **AECMA:** PR EN 2952 #### **6. Product Applications** Nimonic PE11 is used in various high-temperature applications requiring reliable performance: * **Aerospace Gas Turbines:** * Turbine blades and vanes * Discs and rotors * Combustion chamber components * Exhaust system parts * **Industrial Gas Turbines:** * Rotor blades * Stator vanes * Structural components * **Power Generation:** * Gas turbine components * High-temperature fasteners * **Automotive Industry:** * Turbocharger components * High-temperature exhaust parts * **General Engineering:** * High-temperature springs * Fasteners and bolting #### **7. Key Characteristics & Advantages** * **Good High-Temperature Strength:** Reliable mechanical properties at temperatures up to 750°C (1382°F) * **Excellent Oxidation Resistance:** Good resistance to scaling and oxidation in high-temperature environments * **Good Fabricability:** Better formability and weldability compared to higher-strength superalloys * **Balanced Properties:** Optimal combination of strength, ductility, and environmental resistance * **Good Creep Resistance:** Suitable for long-term service under moderate stress conditions * **Thermal Stability:** Maintains microstructural integrity during extended high-temperature exposure * **Cost-Effective Performance:** Provides good value for applications not requiring ultra-high strength --- **Disclaimer:** *Nimonic® is a registered trademark of Rolls-Royce plc. The values provided are typical and for informational purposes only. For critical applications, always consult the official material data sheets from the supplier and relevant design codes.*

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 1663 gallon liquid totes Special package is available on request.