Alloy R41,Udimet alloy R41 ,UNS N07041,E FORU

British Specs:，American Specs: AMS 5545 Sheet, Strip and Plate AMS 5712 Bars and Forgings AMS 5713 Bars and Forgings AMS 5800 Welding Wire，German Specs:

### **Technical Data Sheet: Alloy R41 / Udimet Alloy R41 (UNS N07041)** **Alloy R41**, historically and commonly known as **Udimet Alloy R41**, is a high-strength, precipitation-hardenable nickel-chromium-cobalt superalloy. Designated as **UNS N07041**, it was developed for extreme service conditions requiring a combination of exceptional high-temperature strength, excellent creep resistance, and good oxidation resistance up to 1800°F (982°C). Its remarkable properties are achieved through a solution treatment followed by an aging heat treatment, which precipitates a high volume fraction of the strengthening gamma prime [γ'] phase (Ni₃(Al, Ti)). The name "Udimet" originates from the family of high-temperature alloys developed by Special Metals Corporation, with R41 being one of the most prominent members of this series. --- ### **1. Chemical Composition** The chemical composition of Udimet R41 (UNS N07041) is precisely controlled to achieve its signature performance. The typical composition range is as follows: | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | Balance | | **Chromium (Cr)** | 18.00 - 20.00 | | **Cobalt (Co)** | 10.00 - 12.00 | | **Molybdenum (Mo)** | 9.00 - 10.50 | | **Titanium (Ti)** | 3.00 - 3.50 | | **Aluminum (Al)** | 1.40 - 1.80 | | **Iron (Fe)** | 5.00 max | | **Silicon (Si)** | 0.50 max | | **Manganese (Mn)** | 0.50 max | | **Carbon (C)** | 0.06 - 0.12 | | **Boron (B)** | 0.003 - 0.010 | | **Copper (Cu)** | 0.50 max | * **Key Alloying Elements:** * **Cr:** Provides essential oxidation and hot corrosion resistance. * **Co & Mo:** Contribute to solid solution strengthening. * **Al & Ti:** The primary elements for forming the strengthening γ' phase (Ni₃(Al, Ti)) during aging, which is responsible for the alloy's high-temperature strength. --- ### **2. Physical Properties** The following are typical physical properties for R41 in the solution-annealed condition. | Property | Value / Condition | | :--- | :--- | | **Density** | 0.298 lb/in³ (8.25 g/cm³) | | **Melting Range** | 2410 - 2570°F (1320 - 1410°C) | | **Electrical Resistivity** | 48.6 μΩ·in at 70°F (1.23 μΩ·m at 21°C) | | **Thermal Conductivity** | 74.0 Btu·in/(hr·ft²·°F) at 70°F (10.7 W/m·K at 21°C) | | **Mean Coefficient of Thermal Expansion** | 7.5 x 10⁻⁶ in/in/°F (70 - 1200°F)
13.5 x 10⁻⁶ in/in/°F (20 - 650°C) | | **Modulus of Elasticity (E)** | 31.4 x 10⁶ psi (216 GPa) | --- ### **3. Mechanical Properties** Mechanical properties are highly dependent on the heat treatment condition. A full heat treatment typically involves a solution anneal followed by a multi-step aging process to optimize strength and ductility. **Typical Room-Temperature Mechanical Properties (Aged Condition):** | Condition | **Tensile Strength** | **Yield Strength (0.2% Offset)** | **Elongation (%)** | | :--- | :--- | :--- | :--- | | **Solution Annealed & Aged** | 180 - 200 ksi
(1240 - 1380 MPa) | 150 - 165 ksi
(1035 - 1140 MPa) | 8 - 15% | *It retains a significant portion of its strength at elevated temperatures, exhibiting excellent stress-rupture and creep resistance.* --- ### **4. Product Applications** Udimet R41 is selected for the most demanding high-stress, high-temperature applications, primarily in the aerospace and power generation industries. * **Aerospace Jet Engines / Gas Turbines:** * Turbine blades and vanes * Turbine discs (forgings) * Shafts, rings, and casings * Afterburner components * High-temperature fasteners and bolts * **Nuclear Applications:** Components requiring high strength and stability in elevated temperature environments. * **High-Performance Automotive:** Turbocharger turbines and components for racing applications. * **Chemical Processing:** Equipment for high-temperature and corrosive environments. --- ### **5. International Standards** Udimet R41 (UNS N07041) is covered by several key international and industry-specific standards for various product forms. | Standard Organization | Standard Number | Title / Description (Product Form) | | :--- | :--- | :--- | | **ASTM International** | **ASTM B637** | Standard Specification for Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock for High-Temperature Service | | **Aerospace Material Spec. (AMS)** | **AMS 5545** | Sheet, Strip, and Plate, Nickel Alloy, Corrosion and Heat-Resistant, 19Cr - 11Co - 10Mo - 3.1Ti - 1.6Al, Solution Heat Treated | | **Aerospace Material Spec. (AMS)** | **AMS 5712** | Forgings and Rings, Nickel Alloy, Corrosion and Heat-Resistant, 19Cr - 11Co - 10Mo - 3.1Ti - 1.6Al, Solution Heat Treated, Precipitation Hardenable | | **Aerospace Material Spec. (AMS)** | **AMS 5836** | Wire, Nickel Alloy, Corrosion and Heat Resistant, 19Cr - 11Co - 10Mo - 3.1Ti - 1.6Al, Solution Heat Treated | | **UNS** | **N07041** | Unified Numbering System designation. | | **Werkstoff Nr.** | **2.4972** | Common German material number. | --- ### **Summary** **Udimet Alloy R41 (UNS N07041)** stands as a classic and robust **nickel-based superalloy** within the "Udimet" family. Its superior high-temperature capability, derived from its potent **gamma prime precipitation hardening**, has made it a cornerstone material for rotating and static components in gas turbine engines for decades. Compliance with rigorous standards like **AMS 5712** (forgings) and **AMS 5545** (sheet/plate) ensures its performance and reliability in the world's most critical propulsion and power systems.

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 2326 gallon liquid totes Special package is available on request.