Alloy 25 / L605,Haynes 25 Tube,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 Tube (UNS R30605)** **High-Performance Cobalt-Based Superalloy Tubing for Extreme Service Conditions** --- #### **1. Overview** **Alloy 25 Tube** (commercially known as **Haynes 25**, **L605**, or **UNS R30605**) is a solid-solution strengthened cobalt-chromium-tungsten-nickel superalloy manufactured in tubular form. This product is specifically engineered for applications requiring exceptional strength at elevated temperatures, outstanding oxidation resistance, and excellent structural stability in aggressive environments. The tube form of L605 is particularly valuable for applications involving fluid transport, heat exchange, and structural components in high-temperature systems. Its combination of mechanical properties and environmental resistance makes it a preferred choice for the most demanding applications in aerospace, energy, and chemical processing industries. --- #### **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) | | **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 Condition)** - **Room Temperature 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 - **Elevated Temperature Performance**: - Excellent creep and rupture strength up to **980°C (1800°F)** - Good structural stability under thermal cycling conditions - Maintains mechanical properties in oxidizing atmospheres up to **1150°C (2100°F)** --- #### **5. International Standards & Specifications** | Standard Organization | Standard Designation | Description | |----------------------|----------------------|-------------| | **ASTM International** | **ASTM F90** | Wrought cobalt-20chromium-15tungsten-10nickel alloy | | **Aerospace (SAE/AMS)** | **AMS 5759** | Bars, forgings, and rings | | **ASME** | **SB-574** | Seamless and welded tubes | | **Unified Numbering System** | **UNS R30605** | All product forms | | **European (EN)** | **2.4964** | Material number | --- #### **6. Product Applications** **Aerospace & Defense**: - Gas turbine engine components - Combustion liners and flame tubes - Afterburner components - Exhaust system parts - Hydraulic and fuel system tubing **Industrial & Energy**: - Heat exchanger tubing - Process gas tubing - Thermocouple protection sheaths - High-temperature furnace components - Chemical processing equipment **Medical Technology**: - Orthopedic implant components - Surgical instrument tubing - Specialized medical device applications --- #### **7. Manufacturing & Fabrication** **Tube Types Available**: - Seamless tubes - Welded and drawn tubes - Custom sizes and wall thicknesses **Fabrication Characteristics**: - **Machining**: Requires sharp tools and positive rake angles - **Welding**: Excellent weldability using TIG and MIG processes - **Forming**: Good cold forming characteristics - **Heat Treatment**: Typically supplied in annealed condition --- #### **8. Quality Assurance** - Certified to meet ASTM, AMS, and other international standards - Full traceability and material certification - Non-destructive testing available (UT, ET, RT) - Comprehensive dimensional inspection --- **Note**: This technical data sheet provides typical values and characteristics. Specific properties may vary depending on manufacturing process, heat treatment, and tube dimensions. Users should consult with our technical team for application-specific recommendations and verification of properties for critical applications.

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 2200 gallon liquid totes Special package is available on request.