Alloy 25 / L605,Haynes 25 Fittings,UNS R30605,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** **Alloy 25 Fittings** (commercially known as **Haynes 25**, **L605**, or **UNS R30605**) are precision-engineered fluid system components manufactured from cobalt-chromium-tungsten-nickel superalloy. These fittings are specifically designed to maintain structural integrity and leak-free performance in extreme temperature and corrosive environments where conventional stainless steels would fail. Engineered for critical fluid handling systems, L605 fittings offer exceptional resistance to oxidation, sulfidation, and thermal fatigue while maintaining excellent strength and dimensional stability across a wide temperature range. Their non-magnetic properties and compatibility with various aggressive media make them ideal for aerospace, chemical processing, and high-performance energy applications. --- #### **2. Chemical Composition (Typical Weight %)** | Element | Content (%) | Role in the Alloy | |---------|-------------|-------------------| | **Cobalt (Co)** | Balance | Base matrix providing solid-solution strength and inherent wear resistance | | **Chromium (Cr)** | 19.0 - 21.0 | Provides exceptional oxidation and hot corrosion resistance | | **Tungsten (W)** | 14.0 - 16.0 | Primary solid-solution strengthener for high-temperature strength | | **Nickel (Ni)** | 9.0 - 11.0 | Stabilizes the FCC structure, improving ductility and fabricability | | **Iron (Fe)** | 3.0 max | Impurity control | | **Manganese (Mn)** | 1.0 - 2.0 | Enhances hot workability and sulfur control | | **Silicon (Si)** | 0.30 - 0.60 | Acts as deoxidizer and improves oxidation resistance | | **Carbon (C)** | 0.05 - 0.15 | Forms carbides for wear resistance and grain boundary strength | --- #### **3. Physical Properties** | Property | Value / Condition | |----------|-------------------| | **Density** | 9.13 g/cm³ (0.330 lb/in³) | | **Melting Range** | 1330 - 1410°C (2425 - 2570°F) | | **Thermal Conductivity** | 9.6 W/m·K (at 20°C) | | **Coefficient of Thermal Expansion** | 12.5 μm/m·K (20-100°C)
17.8 μm/m·K (20-1000°C) | | **Specific Heat Capacity** | 420 J/kg·K (at 20°C) | | **Electrical Resistivity** | 0.92 μΩ·m | | **Magnetic Permeability** | Essentially non-magnetic | | **Maximum Service Temperature** | 1150°C (2100°F) in oxidizing atmospheres | --- #### **4. Mechanical Properties** **Room Temperature Properties (Annealed Condition)**: - **Tensile Strength**: 950 - 1200 MPa (138 - 174 ksi) - **0.2% Yield Strength**: 450 - 600 MPa (65 - 87 ksi) - **Elongation**: 50 - 60% - **Hardness**: Rockwell B 95 - 105 - **Impact Strength**: 90 - 110 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 Organization | Standard Designation | Description | |----------------------|----------------------|-------------| | **ASTM International** | **ASTM F90** | Wrought cobalt-20chromium-15tungsten-10nickel alloy | | **ASME** | **SB-574** | Pipe and tube fittings | | **Aerospace (SAE/AMS)** | **AMS 5759** | Bar and forging stock for fittings | | **Unified Numbering System** | **UNS R30605** | All product forms | | **ANSI/ASME** | **B16.11** | Forged fittings, socket-weld and threaded | --- #### **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 **Energy & Power Generation**: - Gas turbine fuel nozzle connections - Heat exchanger piping connections - High-temperature instrumentation ports - Boiler and steam system components - Nuclear instrumentation fittings **Industrial Processing**: - Chemical reactor connections - High-temperature furnace piping - Thermal fluid system components - Exhaust gas sampling ports - Semiconductor processing equipment --- #### **7. Available Fitting Types & Configurations** **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°) - Tees (Straight, Reducing) - Crosses - Couplings - Unions - Caps - Bushings - Nipples **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 Assurance** **Manufacturing Processes**: - Precision forging - CNC machining - Heat treatment per AMS 2750 - Surface finishing and deburring - 100% dimensional verification **Quality Standards**: - Certified to ASTM F90 and ASME SB-574 - Non-destructive testing available (PT, MT) - 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 --- **Note**: This technical data sheet provides typical values and characteristics. Specific pressure ratings and performance data vary by fitting design, size, and application conditions. Consult with our engineering team for application-specific recommendations and detailed pressure-temperature ratings.

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 2204 gallon liquid totes Special package is available on request.