Alloy R41,Rene 41 Strip,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 Strip (UNS N07041) - Technical Datasheet** #### **1. Overview** Alloy R-41 (René 41) Strip is the thin, cold-rolled product form of this high-strength, precipitation-hardenable nickel-based superalloy. Characterized by its precise dimensional tolerances and superior surface finish, René 41 Strip offers exceptional high-temperature strength up to 980°C (1800°F) combined with excellent oxidation resistance, making it ideal for precision components in aerospace and industrial 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** **Solution Annealed Condition (As-Supplied):** - **Tensile Strength:** 860-1030 MPa (125-150 ksi) - **Yield Strength (0.2% Offset):** 480-620 MPa (70-90 ksi) - **Elongation:** 20-35% - **Hardness:** 25-32 HRC **Aged Condition (After Heat Treatment):** - **Tensile Strength:** 1310-1520 MPa (190-220 ksi) - **Yield Strength:** 1030-1240 MPa (150-180 ksi) - **Elongation:** 8-15% - **Hardness:** 36-42 HRC #### **5. René 41 Strip Product Specifications** **Product Forms:** - **Cold Rolled Strip:** Precision rolled to tight tolerances - **Solution Annealed Strip:** Optimal for stamping and forming - **Hard Temper Strip:** For spring and high-strength applications - **Precision Slit Strip:** Custom widths with burr-free edges **Standard Sizes:** - **Thickness Range:** 0.05 mm to 2.0 mm (0.002" to 0.080") - **Width Range:** 3 mm to 300 mm (0.125" to 12") - **Coil Dimensions:** ID 300-500 mm, OD up to 1500 mm **Tolerances:** - **Thickness:** ±0.005mm for precision grades - **Width:** ±0.05mm for slit edges - **Camber:** 1mm per meter maximum - **Surface Finish:** 0.8 μm Ra for special finishes #### **6. Applications** **Aerospace & Defense:** - **Turbine Engine Seals:** Blade tip seals, labyrinth seals - **Combustion Components:** Flame holders, swirlers - **Aircraft Structures:** Shims, spacers, retaining rings - **Missile Systems:** Guidance system components **Industrial Applications:** - **Gas Turbine Components:** Seal strips, wear plates - **Nuclear Industry:** Control rod components, springs - **Chemical Processing:** Gaskets, diaphragm seals - **Medical Devices:** Surgical instrument components **Electrical & Electronic:** - **High-Temperature Springs:** Electrical contact springs - **Connector Components:** Aerospace electrical connectors - **Sensor Elements:** High-temperature sensor components #### **7. Fabrication & Processing** **Stamping & Forming:** - **Blank Preparation:** Shear or precision blanking recommended - **Die Clearance:** 5-8% of material thickness - **Forming Lubrication:** Required for complex shapes - **Annealing:** Intermediate annealing may be required for severe forming **Heat Treatment:** - **Solution Treatment:** 1065-1080°C (1950-1975°F), rapid cool - **Aging Treatment:** 760°C (1400°F) for 16 hours, air cool - **Stress Relieving:** 870°C (1600°F) for 1 hour **Joining Methods:** - **Resistance Welding:** Spot and seam welding suitable - **Brazing:** Nickel-based brazing alloys recommended - **Adhesive Bonding:** Surface preparation required #### **8. International Standards** **Aerospace Specifications:** - **AMS 5545:** Sheet, Strip, and Plate - **AMS 5580:** General Requirements for Thin Strip **ASTM Standards:** - **ASTM B637:** Bar, Forgings, and Forging Stock - **ASTM B906:** General Requirements for Flat-Rolled Nickel Alloys **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 2801:** Ultrasonic Inspection Requirements #### **9. Special Characteristics** **Precision Features:** - Consistent mechanical properties across coil length - Tight thickness control for automated production - Superior surface quality for critical applications - Burr-free edges for precision assembly **Performance Attributes:** - Excellent spring properties at elevated temperatures - Good fatigue resistance in dynamic applications - Maintains dimensional stability after heat treatment - Suitable for high-speed stamping operations #### **10. Quality Assurance** **Testing & Certification:** - Chemical analysis for each heat lot - Mechanical testing per specification requirements - Surface quality inspection - Dimensional verification - Edge condition assessment **Special Tests Available:** - **Spring Properties:** For spring applications - **Fatigue Testing:** For dynamic applications - **Corrosion Testing:** For specific environments - **Metallographic Examination:** For grain structure verification --- **Note:** René 41 Strip is supplied in the solution annealed condition to facilitate forming operations. Final aging heat treatment should be performed after all fabrication is complete to achieve maximum strength properties. The material's sensitivity to strain-age cracking requires careful planning of manufacturing sequences and heat treatment cycles.

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 2320 gallon liquid totes Special package is available on request.