Alloy 25 / L605,Haynes 25 Pipe,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 Pipe (UNS R30605)** **High-Temperature, Corrosion-Resistant Cobalt-Based Alloy Pipe for Extreme Service Applications** --- #### **1. Overview** **Alloy 25 Pipe** (commonly known as **L605**, **Haynes 25**, or **UNS R30605**) is a solid-solution strengthened cobalt-chromium-tungsten-nickel superalloy manufactured in tubular form. Designed for extreme environments, this pipe offers exceptional resistance to oxidation, sulfidation, and high-temperature corrosion, coupled with remarkable tensile and creep strength up to 1150°C (2100°F). Alloy 25 pipes are ideal for transporting aggressive fluids, gases, or exhaust streams in aerospace, energy, and chemical processing industries. Their non-magnetic nature and stability under thermal cycling make them a robust choice for critical piping systems. --- #### **2. Chemical Composition (Typical Weight %)** | Element | Content (%) | Role in the Alloy | |----------------|-----------------|-----------------------------------------------| | **Cobalt (Co)** | Balance | Base matrix; provides solid-solution strength and wear resistance. | | **Chromium (Cr)**| 19.0 - 21.0 | Confers exceptional oxidation and corrosion resistance. | | **Tungsten (W)** | 14.0 - 16.0 | Primary solid-solution strengthener; enhances high-temperature strength. | | **Nickel (Ni)** | 9.0 - 11.0 | Stabilizes the FCC structure; improves ductility and fabricability. | | **Iron (Fe)** | ≤3.0 | Impurity control. | | **Manganese (Mn)**| 1.0 - 2.0 | Enhances hot workability and sulfur control. | | **Silicon (Si)** | 0.30 - 0.60 | Improves oxidation resistance and acts as a deoxidizer. | | **Carbon (C)** | 0.05 - 0.15 | Forms carbides for wear resistance and grain boundary strength. | | **Phosphorus (P)**| ≤0.03 | Impurity control. | | **Sulfur (S)** | ≤0.03 | Impurity control. | --- #### **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 | --- #### **4. Mechanical Properties (Typical for Annealed Pipe)** - **Room Temperature Tensile Properties**: - **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 - **High-Temperature Performance**: - Excellent creep rupture strength and oxidation resistance up to **1150°C (2100°F)**. - Suitable for prolonged service in pressurized systems at temperatures exceeding **980°C (1800°F)**. --- #### **5. International Standards & Specifications for Pipe** | Standard Organization | Standard Designation | Description | |-----------------------------|-------------------------------|-------------| | **Aerospace (SAE/AMS)** | **AMS 5759** | Bar, forgings, and rings (chemical reference). | | **ASTM International** | **ASTM F90** | Covers bar, wire, sheet, and plate (often referenced for pipe). | | **ASME** | **ASTM F90 / SB-574** | Pressure vessel and piping applications. | | **Unified Numbering System**| **UNS R30605** | All product forms. | | **European (EN)** | **2.4964** (Material Number) | - | **Note**: Pipes are typically supplied in the annealed condition. Custom sizes and schedules are available per customer requirements. --- #### **6. Product Applications for Pipe Form** - **Aerospace & Defense**: - Exhaust and thrust vector systems. - High-temperature fuel and hydraulic lines. - Afterburner and combustor components. - **Energy & Power Generation**: - Combustor liners and transition ducts in gas turbines. - High-temperature heat exchanger tubing. - Exhaust gas recirculation (EGR) systems. - **Chemical Processing**: - Tubing for corrosive and high-temperature fluid transport. - Reactor and furnace components. - **Medical & Pharmaceutical**: - High-precision tubing for implantable devices and surgical instruments. --- #### **7. Fabrication & Welding Notes** - **Machining**: Use carbide tools with positive rake angles and adequate cooling. - **Welding**: Excellent weldability via TIG, MIG, and laser welding. Use **L605 filler wire** for optimal results. - **Forming**: Hot forming recommended at 1175°C - 1230°C (2150°F - 2250°F). - **Corrosion Resistance**: Superior performance in oxidizing and sulfidizing environments; not recommended for reducing acids. --- **Disclaimer**: This data is for informational purposes only. Always refer to the manufacturer’s technical data sheets and relevant standards (e.g., ASTM F90, AMS 5759) for specific project 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 2199 gallon liquid totes Special package is available on request.