Alloy R41,Rene 41 Foil,Shim,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:

### **Introduction to Alloy R41 (UNS N07041)** **Alloy R41** (commonly known as **Rene 41**), standardized as **UNS N07041**, is a precipitation-hardenable, nickel-chromium-cobalt superalloy. It is renowned for its exceptional high-temperature strength, excellent creep resistance, and good oxidation resistance up to 1800°F (982°C). The alloy achieves its outstanding properties through a solution treatment followed by an aging heat treatment, which precipitates a strong gamma prime [γ'] phase (Ni₃(Al, Ti)). The product forms you mentioned—**Foil** and **Shim**—are thin-gauge versions of this superalloy, typically used in critical sealing and spacing applications in high-temperature environments where other materials would fail. --- ### **1. Chemical Composition** The typical chemical composition of Rene 41 (UNS N07041) 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 | *The combination of Cr for oxidation resistance, and Al+Ti for γ' precipitation hardening, is key to its performance.* --- ### **2. Physical Properties** The following are typical physical properties for Rene 41 in the solution-annealed condition. | Property | Value | | :--- | :--- | | **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. The following are typical minimums for aged material at room temperature. | 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% | *Note: Foil and shim stock may have slightly different mechanical property ranges due to their thin cross-sections and specific processing.* --- ### **4. Product Applications** **Rene 41 Foil and Shims** are critical in applications requiring thin, high-strength, heat-resistant components. * **Aerospace Jet Engines:** Used as sealing shims for turbine casings, combustor seals, and nozzle components. The shims maintain precise clearances between static and rotating parts at extreme temperatures. * **Gas Turbines:** Similar applications as in aerospace, including spacers, seals, and gaskets in hot sections. * **Nuclear Applications:** Used for components requiring high strength and corrosion resistance in elevated temperature environments. * **Chemical Processing:** For high-temperature fixtures, trays, and support mesh in furnaces. --- ### **5. International Standards** Rene 41 (UNS N07041) is covered by several international and industry-specific standards. | Standard Organization | Standard Number | Title / Description | | :--- | :--- | :--- | | **ASTM International** | **ASTM B637** | Standard Specification for Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock for High-Temperature Service | | **Aerospace Material Spec.** | **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 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 5875** | Seamless Tubing, Nickel Alloy, Corrosion and Heat-Resistant, 19Cr - 11Co - 10Mo - 3.1Ti - 1.6Al, Solution Heat Treated | | **UNS** | **N07041** | Unified Numbering System designation for this specific alloy composition. | | **Werkstoff Nr.** | **2.4972** | Common German material number. | *For foil and shim products, the relevant specifications are often derived from sheet and strip standards like AMS 5545, with specific requirements for thickness, flatness, and surface finish.* --- ### **Summary** **Alloy R41 / Rene 41 / UNS N07041** is a premier high-temperature superalloy chosen for the most demanding applications in aerospace and industrial gas turbines. Its **Foil** and **Shim** product forms leverage the alloy's superior strength and oxidation resistance in thin gauges, making them indispensable for precision sealing and spacing in environments where failure is not an option. Compliance with standards like **AMS 5545** and **ASTM B637** ensures material consistency and reliability for these critical components.

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 2324 gallon liquid totes Special package is available on request.