Alloy R41,Rene 41 Fittings,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 Fittings (UNS N07041) - Technical Datasheet** #### **1. Overview** Alloy R-41 (René 41) Fittings are precision-engineered components manufactured from this high-strength, precipitation-hardenable nickel-based superalloy. Designed for extreme service conditions, René 41 Fittings maintain exceptional mechanical properties and corrosion resistance at temperatures up to 980°C (1800°F), providing reliable performance in critical high-temperature, high-pressure fluid systems. #### **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 | #### **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% - **Hardness:** 36-42 HRC - **Impact Strength:** 20-35 J (15-25 ft-lb) **Elevated Temperature Properties (870°C/1600°F):** - **Tensile Strength:** 620-690 MPa (90-100 ksi) - **Yield Strength:** 480-550 MPa (70-80 ksi) - **Stress Rupture (100h life):** 170 MPa (25 ksi) #### **5. René 41 Fittings Product Range** **Fitting Types:** - **Tube Fittings:** Ferrule fittings, union fittings, elbow connectors - **Pipe Fittings:** Elbows, tees, reducers, couplings, unions - **Flange Fittings:** Weld neck, socket weld, threaded flanges - **Special Fittings:** Adapters, crosses, caps, plugs **Size Ranges:** - **Tube Fittings:** 1/8" to 2" OD - **Pipe Fittings:** 1/8" to 4" NPS - **Pressure Ratings:** Up to 6000 psi dependent on size and type - **Temperature Ratings:** -250°C to 980°C (-420°F to 1800°F) **Manufacturing Standards:** - **Thread Standards:** NPT, BSP, BSPT, SAE - **Surface Finish:** 0.8 μm Ra maximum for sealing surfaces - **Dimensional Tolerances:** Per ASME B16.11 and MS33675 #### **6. Applications** **Aerospace & Defense:** - **Aircraft Hydraulic Systems:** High-pressure fittings and connectors - **Jet Engine Systems:** Fuel, oil, and hydraulic line fittings - **Rocket Propulsion:** Propellant feed system components - **Missile Systems:** Guidance and control fluid systems **Power Generation:** - **Gas Turbine Systems:** Fuel gas and lube oil fittings - **Nuclear Power Plants:** Instrumentation and control fittings - **Steam Systems:** High-temperature steam line components **Industrial Applications:** - **Chemical Processing:** Corrosive fluid handling systems - **Oil & Gas:** Downhole tooling and surface equipment - **Test Facilities:** High-pressure, high-temperature test systems #### **7. Manufacturing & Quality** **Manufacturing Processes:** - **Machining:** CNC machining from bar stock or forgings - **Forging:** Hot forging for superior grain structure - **Investment Casting:** For complex geometries - **Quality Heat Treatment:** Full solution and aging treatment **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:** Available for complex geometries **Quality Assurance:** - **Dimensional Inspection:** 100% dimensional verification - **NDE Testing:** Liquid penetrant or magnetic particle inspection - **Pressure Testing:** Hydrostatic or pneumatic testing - **Material Verification:** PMI and certification review #### **8. International Standards** **Aerospace Standards:** - **AMS 5712:** Bars, Forgings, and Rings - **MS33675:** Tube Fitting Bosses - **NAS 1599:** Fitting, Coupling, Tube, Flaredless **Industry Standards:** - **ASME B16.11:** Forged Fittings, Socket-Welding and Threaded - **SAE AS 4846:** Joint, Flared Tube, Fitting - General Specification - **ISO 8434:** Metallic tube connections for fluid power **Quality Standards:** - **MIL-F-27628:** Fitting, Coupling, Tube, Flaredless - **MIL-STD-2154:** Inspection, Ultrasonic, for Wrought Metals - **EN 10204 3.1/3.2:** Material Certification #### **9. Installation & Service** **Installation Guidelines:** - **Torque Values:** Manufacturer-specified torque requirements - **Sealing Methods:** Metallic seals recommended for high temperatures - **Alignment:** Proper alignment to prevent stress concentrations - **Cleaning:** Clean, contaminant-free installation required **Service Considerations:** - **Thermal Cycling:** Excellent resistance to thermal fatigue - **Vibration Service:** Good performance in vibrating environments - **Corrosion Resistance:** Suitable for most industrial atmospheres - **Maintenance:** Minimal maintenance required in proper service #### **10. Technical Advantages** **Performance Benefits:** - Exceptional strength-to-weight ratio - Superior high-temperature pressure capability - Excellent creep rupture strength - Good resistance to thermal shock - Maintains properties in cryogenic to extreme high temperatures **Reliability Features:** - Consistent mechanical properties - Excellent metallurgical stability - Proven performance in critical applications - Long service life in designed conditions --- **Note:** René 41 Fittings are typically supplied in the fully heat treated condition (solution treated and aged) unless specified otherwise. Special attention must be paid to welding procedures and post-weld heat treatment to maintain material properties and prevent strain-age cracking. Consultation with the fitting manufacturer is recommended for specific application requirements and installation procedures.

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 2321 gallon liquid totes Special package is available on request.