Alloy 25 / L605,Udimet L605 Fittings,UNS W73605,E FORU

British Specs:，American Specs:AMS 5537 Sheet AMS 5759 Bar & Rod AMS 5796 Welding wire AMS 5797 Covered welding rod，German Specs:

### **Technical Data Sheet: Alloy 25 / L605 / Haynes 25 Fittings (UNS R30605)** **Precision High-Temperature Fluid System Components** --- #### **1. Overview & Designation Clarification** **CORRECT DESIGNATIONS:** - **Alloy 25, L605, Haynes 25** - Standard commercial names - **UNS R30605** - Correct Unified Numbering System designation - **ASTM B366** - Fittings specification reference **DESIGNATION CORRECTION:** - "Udimet L605" is incorrect - Udimet alloys are nickel-based superalloys - "UNS W73605" is incorrect for this material Alloy 25 Fittings are precision-engineered fluid system components manufactured from cobalt-chromium-tungsten-nickel superalloy, designed to maintain structural integrity and leak-free performance in extreme temperature and corrosive environments where conventional stainless steels would fail. --- #### **2. Chemical Composition (Typical Weight %)** | Element | Content (%) | Role in the Alloy | |---------|-------------|-------------------| | **Cobalt (Co)** | Balance | Base matrix providing solid-solution strength and wear resistance | | **Chromium (Cr)** | 19.0 - 21.0 | Exceptional oxidation and hot corrosion resistance | | **Tungsten (W)** | 14.0 - 16.0 | Primary solid-solution strengthener | | **Nickel (Ni)** | 9.0 - 11.0 | Stabilizes FCC structure, improves ductility | | **Iron (Fe)** | 3.0 max | Impurity control | | **Manganese (Mn)** | 1.0 - 2.0 | Enhances hot workability | | **Silicon (Si)** | 0.30 - 0.60 | Improves oxidation resistance | | **Carbon (C)** | 0.05 - 0.15 | Carbide formation for wear resistance | --- #### **3. Physical Properties** | Property | Value | |----------|-------| | **Density** | 9.13 g/cm³ (0.330 lb/in³) | | **Melting Range** | 1330 - 1410°C (2425 - 2570°F) | | **Thermal Conductivity** | 9.6 W/m·K (20°C) | | **Coefficient of Thermal Expansion** | 12.5 μm/m·K (20-100°C) | | **Specific Heat Capacity** | 420 J/kg·K (20°C) | | **Electrical Resistivity** | 0.92 μΩ·m | | **Magnetic Permeability** | Essentially non-magnetic | --- #### **4. Mechanical Properties** **Fittings (Annealed Condition):** - **Tensile Strength**: 1000 - 1250 MPa (145 - 181 ksi) - **0.2% Yield Strength**: 500 - 700 MPa (73 - 102 ksi) - **Elongation**: 45 - 55% - **Hardness**: Rockwell B 98 - 108 - **Impact Strength**: 80 - 100 J (Charpy V-notch) **Pressure-Temperature Rating:** - **Maximum Working Pressure**: Varies with fitting design and temperature - **Temperature Range**: -185°C to 1150°C (-300°F to 2100°F) - **Pressure Retention**: Excellent creep resistance maintains sealing integrity --- #### **5. International Standards & Specifications** | Standard | Description | Application | |----------|-------------|-------------| | **ASTM B366** | Factory-made wrought fittings | General requirements | | **ASME B16.11** | Forged fittings, socket-weld and threaded | Dimensional standard | | **ISO 1127** | Stainless steel tubes | Dimensional reference | | **UNS R30605** | Correct UNS designation | Material specification | | **AMS 5759** | Bars and forgings | Material source | --- #### **6. Product Applications** **Aerospace & Defense:** - Gas turbine engine fuel system fittings - Hydraulic and pneumatic system components - Afterburner fuel manifold connections - High-temperature instrumentation fittings - Missile and spacecraft fluid systems **Power Generation:** - Gas turbine fuel nozzle connections - Heat exchanger piping connections - High-temperature instrumentation ports - Boiler and steam system components **Industrial Processing:** - Chemical reactor connections - High-temperature furnace piping - Thermal fluid system components - Semiconductor processing equipment --- #### **7. Available Fitting Types** **Connection Types:** - **Socket Weld Fittings** - **Butt Weld Fittings** - **Threaded Fittings** (NPT, BSPP, BSPT) - **Tube Fittings** (37° flare, compression) - **Special Custom Connections** **Standard Configurations:** - **Elbows**: 45°, 90°, 180° - **Tees**: Straight, Reducing - **Crosses**: Four-way connections - **Couplings**: Half-couplings, Full-couplings - **Unions**: Ground joint, precision machined - **Caps**: Socket weld, Threaded - **Bushings**: Hex, Socket - **Nipples**: Barrel, Hex **Size Ranges:** - **Tube Fittings**: 1/8" to 2" OD - **Pipe Fittings**: 1/8" to 2" NPT - **Socket Weld**: 1/8" to 2" - **Butt Weld**: 1/8" to 4" --- #### **8. Manufacturing & Quality** **Manufacturing Processes:** - Precision hot forging - CNC machining - Heat treatment per AMS 2750 - Surface finishing and deburring - 100% dimensional verification **Quality Assurance:** - Certified to ASTM B366 and ASME B16.11 - Liquid penetrant inspection per AMS 2647 - Pressure testing per customer requirements - Full material traceability - Certificates of Compliance and Conformance **Special Features:** - Optimized for compatibility with L605 tubing and pipe - Suitable for high-vibration environments - Excellent thermal cycling resistance - Maintains sealing integrity under thermal expansion - Corrosion-resistant in oxidizing and reducing environments --- #### **9. Technical Specifications** **Pressure Ratings:** - **Socket Weld**: Class 3000, 6000, 9000 - **Threaded**: Class 2000, 3000, 6000 - **Butt Weld**: Schedule 40, 80, 160 **Temperature Performance:** - **Continuous Service**: Up to 1150°C (2100°F) - **Intermittent Service**: Up to 1200°C (2190°F) - **Cryogenic Service**: Down to -185°C (-300°F) **Corrosion Resistance:** - **Excellent**: Oxidation, sulfidation, hot corrosion - **Good**: Carburization, nitridation - **Fair**: Reducing acids (with limitations) --- **Important Note**: This datasheet provides accurate technical data for genuine **Alloy 25/L605/Haynes 25 Fittings (UNS R30605)**. The designations "Udimet L605" and "UNS W73605" are incorrect and should not be used. Always verify material certifications against ASTM B366 and applicable dimensional standards for critical applications. Pressure ratings vary with temperature and specific fitting design - consult manufacturer for detailed pressure-temperature charts.

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 2217 gallon liquid totes Special package is available on request.