Alloy R41,Rene 41 Sheet,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:

### **Alloy R-41 / René 41 Sheet (UNS N07041) - Technical Datasheet** #### **1. Overview** Alloy R-41 (René 41) Sheet is the thin, flat-rolled product form of this high-strength, precipitation-hardenable nickel-based superalloy. Designed to provide exceptional mechanical properties at temperatures up to 980°C (1800°F), René 41 Sheet combines outstanding high-temperature strength with excellent oxidation resistance, making it particularly suitable for formed and fabricated components in aerospace and gas turbine applications. #### **2. Chemical Composition** | Element | Content (%) | | :--- | :--- | | **Nickel (Ni)** | Balance | | **Chromium (Cr)** | 18.00 - 20.00 | | **Cobalt (Co)** | 10.00 - 12.00 | | **Molybdenum (Mo)** | 9.00 - 10.50 | | **Aluminum (Al)** | 1.40 - 1.80 | | **Titanium (Ti)** | 3.00 - 3.50 | | **Iron (Fe)** | ≤ 2.00 | | **Carbon (C)** | 0.06 - 0.12 | | **Boron (B)** | 0.003 - 0.010 | | **Silicon (Si)** | ≤ 0.50 | | **Manganese (Mn)** | ≤ 0.50 | | **Copper (Cu)** | ≤ 0.50 | | **Sulfur (S)** | ≤ 0.015 | #### **3. Physical Properties** | Property | Metric Value | Imperial Value | | :--- | :--- | :--- | | **Density** | 8.27 g/cm³ | 0.299 lb/in³ | | **Melting Range** | 1316-1371 °C | 2400-2500 °F | | **Thermal Expansion (20-100°C)** | 12.6 μm/m·°C | 7.0 μin/in·°F | | **Thermal Conductivity** | 12.5 W/m·K | 86.6 BTU·in/hr·ft²·°F | | **Specific Heat Capacity** | 440 J/kg·K | 0.105 BTU/lb·°F | | **Modulus of Elasticity** | 221 GPa | 32 × 10⁶ psi | | **Electrical Resistivity** | 1.30 μΩ·m | - | #### **4. Mechanical Properties** **Room Temperature (Aged Condition):** - **Tensile Strength:** 1310-1520 MPa (190-220 ksi) - **Yield Strength (0.2% Offset):** 1030-1240 MPa (150-180 ksi) - **Elongation:** 8-15% - **Hardness:** 36-42 HRC **Elevated Temperature (870°C/1600°F):** - **Tensile Strength:** 620-690 MPa (90-100 ksi) - **Yield Strength:** 480-550 MPa (70-80 ksi) - **Creep Rupture Strength (100h):** 170 MPa (25 ksi) #### **5. René 41 Sheet Product Specifications** **Product Forms:** - **Hot Rolled Sheet:** As-rolled condition for further processing - **Cold Rolled Sheet:** Precision rolled for improved surface finish - **Solution Annealed Sheet:** Optimal for forming operations - **Solution Treated & Aged Sheet:** Ready for service condition **Standard Sizes:** - **Thickness Range:** 0.3 mm to 3.0 mm (0.012" to 0.125") - **Width Range:** 600 mm to 1200 mm (24" to 48") - **Length Range:** 1000 mm to 2400 mm (40" to 96") - **Custom sizes and tolerances available** **Tolerances:** - **Thickness Tolerance:** ±0.05mm for precision grades - **Flatness:** 2mm per meter standard - **Surface Finish:** 2.5 μm Ra standard, 1.2 μm Ra special finish #### **6. Applications** **Aerospace & Defense:** - **Aircraft Engine Components:** Combustion chamber liners, afterburner components - **Rocket Motor Parts:** Nozzle extensions, thrust chamber assemblies - **Aircraft Structures:** Heat shields, thermal protection systems - **Missile Components:** Skin and structural members **Power Generation:** - **Gas Turbine Parts:** Transition ducts, combustion liners - **Heat Exchanger Components:** Core plates, header sheets - **Exhaust Systems:** Ducting and thermal protection **Industrial Applications:** - **Nuclear Components:** Core baffles, thermal shields - **Chemical Processing:** Reactor liners, high-temperature vessels - **Heat Treatment Fixtures:** Baskets, trays, and supports #### **7. Fabrication & Processing** **Forming Characteristics:** - **Best Formed In:** Solution annealed condition - **Minimum Bend Radius:** 3T for 90° bends (annealed condition) - **Hot Forming Temperature:** 1050-1150°C (1920-2100°F) - **Springback:** Significant - requires compensation in tooling design **Machining Guidelines:** - **Recommended Tools:** Carbide with positive rake angles - **Cutting Speed:** 15-25 m/min for finishing operations - **Feed Rates:** Light to moderate feeds - **Coolant:** Essential for all machining operations **Welding Procedures:** - **Preferred Process:** GTAW (TIG) - **Filler Metal:** René 41 (AMS 5790) - **Preheat:** 200-300°C (400-600°F) - **Post-Weld Heat Treatment:** Required to prevent cracking #### **8. Heat Treatment** **Standard Heat Treatment:** 1. **Solution Treatment:** 1065-1080°C (1950-1975°F) for 15-30 minutes, rapid cool 2. **Aging Treatment:** 760°C (1400°F) for 16 hours, air cool **Alternative Treatments:** - **Short-Time Aging:** 900°C (1650°F) for 4 hours + 760°C (1400°F) for 16 hours - **Stress Relieving:** 870°C (1600°F) for 1 hour, air cool #### **9. International Standards** **Aerospace Specifications:** - **AMS 5545:** Sheet, Strip, and Plate - **AMS 5712:** Bars, Forgings, and Rings (reference) **ASTM/ASME Standards:** - **ASTM B637/ASME SB637:** Bar, Forgings, and Forging Stock **International Equivalents:** - **Europe:** DIN 2.4972 - **France:** NC15K19DAT - **United Kingdom:** HR 506 - **Japan:** JIS NR 401 **Quality Standards:** - **AMS 2249:** Tolerances for Corrosion and Heat Resistant Alloys - **AMS 2355:** Quality Assurance for Premium Aircraft Alloys #### **10. Quality Assurance** **Testing Requirements:** - Chemical analysis certification - Mechanical property verification - Surface quality inspection - Dimensional verification - Grain size assessment **Certification:** - Mill test certificates to EN 10204 3.1/3.2 - Full traceability to melt heat - Compliance certificates to applicable specifications --- **Note:** René 41 Sheet is particularly valued for its ability to be formed into complex shapes while maintaining high-temperature strength. However, the material requires careful attention to heat treatment parameters and fabrication techniques to avoid strain-age cracking. Consultation with materials engineering is essential for successful application of this high-performance alloy.

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 2319 gallon liquid totes Special package is available on request.