Alloy R41,Rene 41 Pipe,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 Pipe (UNS N07041) - Technical Datasheet** #### **1. Overview** Alloy R-41 (René 41) Pipe represents the tubular product form of this high-performance, precipitation-hardenable nickel-based superalloy. Designed for extreme service conditions, René 41 Pipe maintains exceptional strength, corrosion resistance, and structural stability at temperatures up to 980°C (1800°F), making it ideal for high-pressure, high-temperature fluid and gas handling systems in aerospace and power generation 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 Pipe Product Specifications** **Product Forms:** - **Seamless Pipe:** Manufactured through extrusion and pilgering processes - **Welded Pipe:** Formed from sheet and longitudinally welded (less common) - **Schedule:** Standard wall (SCH 40/80/160) and custom sizes available **Size Ranges:** - **Outside Diameter:** 6 mm to 200 mm (0.25" to 8") - **Wall Thickness:** 1 mm to 25 mm (0.035" to 1.0") - **Lengths:** Standard 3-6 meters, custom lengths available **Available Conditions:** - **Annealed:** For subsequent forming and heat treatment - **Solution Treated & Aged:** Ready for service condition - **Solution Treated Only:** For fabrication requiring post-weld aging #### **6. Applications** **Aerospace & Defense:** - **Aircraft Hydraulic Systems:** High-pressure fluid lines - **Jet Engine Components:** Fuel and oil distribution pipes - **Rocket Propulsion Systems:** Propellant feed lines - **Afterburner Fuel Lines:** High-temperature fuel delivery **Power Generation:** - **Gas Turbine Systems:** Fuel gas and oil piping - **Heat Exchanger Tubes:** High-temperature service - **Steam Injection Lines:** Enhanced oil recovery systems **Industrial Applications:** - **Nuclear Reactor Components:** Instrumentation and control lines - **Chemical Processing:** High-temperature reactor tubing - **Test Facilities:** High-pressure, high-temperature test loops #### **7. Fabrication & Welding** **Pipe Fabrication:** - **Bending:** Hot bending recommended for tight radii - **End Preparation:** Machining required for precision connections - **Flaring/Flanging:** Possible in annealed condition with proper tooling **Welding Procedures:** - **Processes:** GTAW (TIG) preferred, GMAW (MIG) possible - **Filler Metal:** René 41 welding wire (AMS 5790) - **Preheat:** 200-300°C (400-600°F) recommended - **Post-Weld Heat Treatment:** Required to prevent strain-age cracking **Heat Treatment:** - **Solution Treatment:** 1065-1080°C (1950-1975°F), rapid cool - **Aging:** 760°C (1400°F) for 16 hours, air cool - **Stress Relieving:** 870°C (1600°F) for 1-2 hours #### **8. International Standards** **Aerospace Specifications:** - **AMS 5581:** Seamless Tubing, Corrosion and Heat Resistant **ASTM/ASME Standards:** - **ASTM B622/ASME SB622:** Seamless Pipe and Tube - **ASTM B829/ASME SB829:** General Requirements for Nickel Alloy Pipe **Dimensional Standards:** - **ASME B36.10M:** Welded and Seamless Wrought Steel Pipe - **ASME B36.19M:** Stainless Steel Pipe **International Equivalents:** - **Europe:** DIN 2.4972 - **France:** NC15K19DAT - **United Kingdom:** HR 506 #### **9. Quality Assurance** **Testing Requirements:** - **Hydrostatic Testing:** Per applicable standard requirements - **Non-Destructive Testing:** Eddy current, ultrasonic, or dye penetrant - **Dimensional Verification:** OD, wall thickness, and ovality checks - **Surface Inspection:** Free from defects and contamination **Certification:** - Mill test certificates to EN 10204 3.1/3.2 - Chemical and mechanical property certification - Heat number traceability throughout manufacturing process #### **10. Technical Considerations** **Design Advantages:** - Excellent high-temperature pressure containment - Superior creep rupture strength - Good resistance to thermal cycling - Maintains strength in thin-wall configurations **Installation Notes:** - Use compatible support systems accounting for thermal expansion - Proper alignment to minimize stress concentrations - Clean, contaminant-free installation required - Follow recommended torque values for connections --- **Note:** René 41 Pipe requires specialized manufacturing expertise due to the alloy's high strength and work hardening characteristics. Proper selection of heat treatment condition is critical based on intended service requirements and fabrication methods. Consultation with materials engineering is recommended for specific application design and installation requirements.

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 2316 gallon liquid totes Special package is available on request.