Alloy 105,Nimonic 105,,E FORU

### **Alloy 105 / Nimonic® 105** **High-Strength Nickel-Based Superalloy for Advanced Gas Turbine Components** #### **1. Overview** **Alloy 105**, commercially known as **Nimonic® 105**, is a precipitation-hardenable nickel-chromium-cobalt superalloy designed for high-stress applications at elevated temperatures. Developed as an advancement over earlier Nimonic alloys, it offers superior creep and rupture strength combined with excellent oxidation resistance. Nimonic 105 is particularly suited for rotating components in gas turbine engines where reliability and long-term performance under extreme conditions are critical. #### **2. Chemical Composition (Weight %)** The typical chemical composition of Nimonic 105 is outlined below. The balance is Nickel (Ni). | Element | Content (%) | Key Function | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | Forms the austenitic matrix and provides fundamental high-temperature capability. | | **Chromium (Cr)** | 14.0 - 15.7 | Provides oxidation and hot corrosion resistance. | | **Cobalt (Co)** | 18.0 - 22.0 | Enhances solid-solution strengthening and raises γ' solvus temperature. | | **Molybdenum (Mo)** | 4.5 - 5.5 | Provides solid-solution strengthening and enhances creep resistance. | | **Aluminum (Al)** | 4.5 - 4.9 | Primary precipitation hardening element forming γ' phase (Ni₃Al). | | **Titanium (Ti)** | 0.9 - 1.5 | Co-precipitates with aluminum to form γ' phase (Ni₃(Al,Ti)). | | **Manganese (Mn)** | 1.0 max | Improves hot workability. | | **Silicon (Si)** | 1.0 max | Enhances oxidation resistance. | | **Iron (Fe)** | 1.0 max | Controlled impurity. | | **Carbon (C)** | 0.12 - 0.17 | Forms carbides for grain boundary strengthening. | | **Boron (B)** | 0.003 - 0.010 | Enhances creep strength and grain boundary cohesion. | | **Zirconium (Zr)** | 0.05 - 0.10 | Improves creep-rupture properties. | | **Copper (Cu)** | 0.20 max | Controlled impurity. | | **Sulfur (S)** | 0.015 max | Impurity, kept low to prevent hot shortness. | #### **3. Physical Properties** | Property | Value / Condition | | :--- | :--- | | **Density** | 8.06 g/cm³ (0.291 lb/in³) | | **Melting Range** | ~ 1340 - 1390 °C (2444 - 2534 °F) | | **Mean Coefficient of Thermal Expansion** | 20 - 500°C (68 - 932°F): **13.5 x 10⁻⁶/°C** (7.5 x 10⁻⁶/°F)
20 - 800°C (68 - 1472°F): **14.8 x 10⁻⁶/°C** (8.2 x 10⁻⁶/°F) | | **Thermal Conductivity** | 16.1 W/m·K (112 Btu·in/hr·ft²·°F) at 20°C (68°F)
24.2 W/m·K (168 Btu·in/hr·ft²·°F) at 800°C (1472°F) | | **Specific Heat** | 450 J/kg·K (0.107 Btu/lb·°F) at 20°C (68°F) | | **Electrical Resistivity** | 1.28 μΩ·m at 20°C (68°F) | | **Modulus of Elasticity (Young's Modulus)** | 225 GPa (32.6 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 750°C (1382°F) | At 850°C (1562°F) | | :--- | :--- | :--- | :--- | | **Tensile Strength** | 1150 - 1350 MPa (167 - 196 ksi) | ~700 MPa (102 ksi) | ~480 MPa (70 ksi) | | **Yield Strength (0.2% Offset)** | 800 - 950 MPa (116 - 138 ksi) | ~620 MPa (90 ksi) | ~420 MPa (61 ksi) | | **Elongation (in 50 mm / 2 in)** | 10% - 20% | 8% - 15% | 10% - 20% | | **Reduction of Area** | 15% - 25% | 12% - 20% | 15% - 25% | | **Hardness (Rockwell C)** | 32 - 40 HRC | - | - | #### **5. International Standards** Nimonic 105 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 5762:** Bar, Forgings, and Rings * **AMS 5799:** Welding Electrode * **BS / EN:** * **BS HR 507:** Aerospace series * **EN 10095:** Heat resisting steels and nickel alloys * **DIN:** 2.4969 (Material Number) * **ISO:** ISO 9723, ISO 9724 * **AECMA:** PR EN 2955 #### **6. Product Applications** Nimonic 105 is primarily used in the most demanding high-temperature applications: * **Aerospace Gas Turbines:** * Turbine blades and vanes * Discs and rotors * Shafts and spools * Combustion chamber components * **Industrial Gas Turbines:** * Turbine blades * Rotor components * High-temperature fasteners * **Power Generation:** * Gas turbine components for power plants * High-temperature bolting * **Nuclear Industry:** * Core components * Heat exchanger parts #### **7. Key Characteristics & Advantages** * **Exceptional Creep Strength:** Outstanding resistance to deformation under sustained load at temperatures up to 950°C (1742°F) * **High Rupture Strength:** Excellent stress rupture properties for long-term service * **Optimized γ' Precipitation:** High aluminum content provides strong precipitation hardening * **Good Oxidation Resistance:** Suitable for long-term exposure in high-temperature environments * **Microstructural Stability:** Maintains mechanical properties during extended service * **Superior Fatigue Resistance:** Withstands cyclic loading conditions at high temperatures * **Proven Reliability:** Extensive service history in critical aerospace applications --- **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 1661 gallon liquid totes Special package is available on request.