Alloy R41,Rene 41 Forgings,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 Forgings (UNS N07041) - Technical Datasheet** #### **1. Overview** Alloy R-41 (René 41) Forgings represent the highest integrity product form of this premium precipitation-hardenable nickel-based superalloy. The forging process aligns the metallic grain structure to component contours, creating superior mechanical properties—particularly fatigue life, toughness, and creep rupture strength—compared to components machined from bar stock. René 41 Forgings maintain exceptional strength and oxidation resistance at temperatures up to 980°C (1800°F). #### **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 (Aged Condition)** **Room Temperature Properties:** - **Tensile Strength:** 1310-1520 MPa (190-220 ksi) - **Yield Strength (0.2% Offset):** 1030-1240 MPa (150-180 ksi) - **Elongation:** 8-15% - **Reduction of Area:** 10-20% - **Hardness:** 36-42 HRC **Elevated Temperature Properties (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 Forgings Product Specifications** **Forging Processes:** - **Open Die Forgings:** Large, simple shapes with controlled grain flow - **Closed Die Forgings:** Complex, near-net shapes with detailed features - **Ring Rolled Forgings:** Seamless rings with circumferential grain orientation - **Precision Forgings:** Minimal machining allowance components **Available Conditions:** - **As-Forged:** For subsequent machining and heat treatment - **Solution Annealed:** Optimal for machining operations - **Solution Treated & Aged:** Ready for service condition **Size Capabilities:** - **Weight Range:** 1 kg to 2000 kg (2 lbs to 4400 lbs) - **Ring Sizes:** OD up to 2000 mm (80 inches) - **Disk Sizes:** Diameter up to 1200 mm (48 inches) #### **6. Applications** **Aerospace & Defense:** - **Turbine Engine Disks:** Compressor and turbine disks (blisks) - **Shafts & Rotors:** High-pressure compressor and turbine shafts - **Rocket Motor Components:** Nozzle supports, casing segments - **Airframe Components:** Landing gear parts, actuator components **Power Generation:** - **Gas Turbine Rotors:** Industrial turbine wheels and disks - **Turbine Blades & Vanes:** First and second stage components - **Compressor Parts:** High-pressure compressor disks **Industrial Applications:** - **Nuclear Components:** Control rod mechanisms, core supports - **Hot Work Tooling:** Extrusion dies, forging dies - **Test Equipment:** High-temperature fixtures and rig components #### **7. Manufacturing & Quality** **Forging Process:** - **Heating Temperature:** 1150-1200°C (2100-2190°F) - **Forging Temperature Range:** 1050-1150°C (1920-2100°F) - **Reduction Ratios:** Minimum 3:1 for property improvement - **Cooling Control:** Controlled cooling to prevent cracking **Heat Treatment:** - **Solution Treatment:** 1065-1080°C (1950-1975°F) for 1-4 hours - **Aging Treatment:** 760°C (1400°F) for 16 hours, air cool - **Alternative Aging:** 900°C (1650°F) for 4 hours + 760°C (1400°F) for 16 hours **Quality Assurance:** - **Ultrasonic Testing:** Per AMS 2631 or customer specification - **Macroetch Testing:** For grain flow verification - **Mechanical Testing:** Tensile, stress rupture, creep testing - **Metallurgical Analysis:** Grain size, inclusion rating #### **8. International Standards** **Aerospace Specifications:** - **AMS 5712:** Bars, Forgings, and Rings (Solution Treated and Aged) - **AMS 5713:** Bars and Forgings (Annealed Condition) **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 2750:** Pyrometry - **AMS 2774:** Heat Treatment of Nickel Alloys - **MIL-STD-2154:** Ultrasonic Inspection #### **9. Design Advantages** **Forging Benefits:** - **Grain Flow Optimization:** Continuous grain structure following component contours - **Improved Fatigue Life:** Superior resistance to cyclic loading - **Enhanced Toughness:** Better impact and fracture toughness - **Reduced Inspection:** Fewer internal defects compared to castings **Technical Advantages:** - **Directional Properties:** Optimized mechanical properties in primary stress directions - **Material Utilization:** Near-net shape reduces machining waste - **Reliability:** Proven performance in rotating applications - **Quality Consistency:** Reproducible properties lot-to-lot #### **10. Technical Considerations** **Design Guidelines:** - **Draft Angles:** 3-7 degrees for die release - **Fillet Radii:** Generous radii to prevent stress concentration - **Machining Allowance:** 2-5 mm depending on size and complexity - **Parting Line:** Strategic placement to minimize flash **Fabrication Notes:** - **Machinability:** Best machined in annealed condition - **Welding:** Possible with proper procedures and post-weld heat treatment - **Grinding:** Suitable for final dimensioning and surface finishing --- **Note:** René 41 Forgings require specialized expertise in thermal processing and deformation control due to the alloy's sensitivity to strain age cracking and its high strength at elevated temperatures. Proper die design, heating control, and post-forging heat treatment are essential to achieve optimal properties. Consultation with forging engineering is recommended during component design and specification.

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 2322 gallon liquid totes Special package is available on request.