Alloy R41,Rene 41 Other/Similar Specs,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 & Equivalent Specifications (UNS N07041) - Technical Overview** #### **1. General Description** Alloy R-41 (René 41) is a high-strength, precipitation-hardenable nickel-chromium-cobalt superalloy renowned for its exceptional high-temperature capabilities. This alloy maintains outstanding mechanical properties, oxidation resistance, and structural stability at temperatures up to 980°C (1800°F), making it suitable for the most demanding aerospace, industrial, and nuclear applications across various international specifications. #### **2. Chemical Composition Requirements** The consistent high-temperature performance is achieved through tightly controlled chemistry: | Element | Content Range (%) | | :--- | :--- | | **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. Typical 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 | #### **4. Mechanical Properties by Product Form** *Typical minimum values for solution treated and aged condition* | Product Form | Tensile Strength | Yield Strength | Elongation | | :--- | :--- | :--- | :--- | | **Bar & Forgings** | 1310 MPa (190 ksi) | 1030 MPa (150 ksi) | 8% | | **Sheet & Strip** | 1310 MPa (190 ksi) | 1030 MPa (150 ksi) | 8% | | **Plate** | 1310 MPa (190 ksi) | 1030 MPa (150 ksi) | 8% | | **Tubing** | 1310 MPa (190 ksi) | 1030 MPa (150 ksi) | 8% | #### **5. Comprehensive International Standards Coverage** **United States Specifications:** - **AMS (Aerospace Material Specification):** - AMS 5545: Sheet, strip, and plate - AMS 5712: Bar, forgings, and rings (Solution treated and aged) - AMS 5713: Bar and forgings (Annealed) - AMS 5790: Welding wire and rod - **ASTM/ASME Standards:** - ASTM B637/ASME SB637: Bar, forgings, and forging stock - ASTM B622/ASME SB622: Seamless pipe and tube **European Specifications:** - **ISO Standards:** - ISO 9724: Nickel alloy bars for high-temperature service - ISO 6208: Nickel alloy plate, sheet, and strip - **National Standards:** - **Germany:** DIN 17752, Werkstoff Nr. 2.4972 - **France:** NC15K19DAT - **United Kingdom:** HR 506 - **Italy:** UNI 6953 **Other National Standards:** - **Japan:** JIS NR 401 - **Russia:** ЭП741 - **China:** GB/T 14992 #### **6. Key Characteristics & Applications** **Primary Advantages:** - Exceptional high-temperature tensile and creep strength - Outstanding oxidation resistance up to 980°C (1800°F) - Excellent thermal fatigue resistance - Good structural stability and microstructural control - Superior short-time and long-time stress rupture properties **Major Applications:** - **Aerospace:** Turbine blades, disks, shafts, afterburner components - **Industrial Gas Turbines:** Rotor components, turbine wheels, bolts - **Nuclear Industry:** Core components, fastening systems - **Power Generation:** High-temperature fasteners, valve components - **Rocket Motors:** Nozzle components, thrust chambers #### **7. Heat Treatment Requirements** Standard heat treatment involves: 1. **Solution Treatment:** 1065-1080°C (1950-1975°F) ± 15°C, rapid cool 2. **Aging:** 760°C (1400°F) for 16 hours, air cool Alternative aging treatments available for specific applications: - 900°C (1650°F) for 4 hours + 760°C (1400°F) for 16 hours #### **8. Quality Assurance** All specifications require: - Chemical analysis certification - Mechanical testing verification - Non-destructive testing (NDT) as required - Grain size control per ASTM E112 - Microcleanliness assessment per applicable standards #### **9. Special Processing Considerations** **Welding:** - Use matching composition filler metal (AMS 5790) - Pre-weld and post-weld heat treatment required - Low heat input and stringer bead techniques preferred - Susceptible to strain age cracking without proper controls **Machining:** - More difficult to machine than austenitic stainless steels - Requires rigid setups and positive rake angles - Carbide tools recommended for production machining - Adequate cooling and lubrication essential --- **Note:** This technical overview summarizes requirements across multiple international specifications. René 41 is known for its susceptibility to strain age cracking, requiring careful attention to heat treatment and welding procedures. For specific application requirements, consult the relevant material standard and involve qualified materials engineering expertise. Properties may vary depending on product form, size, and heat treatment conditions.

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 2323 gallon liquid totes Special package is available on request.