Alloy 25 / L605,Haynes 25 Rod,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 Rod (UNS R30605)** **High-Strength, High-Temperature Cobalt-Based Superalloy Rod** #### **1. Overview** **Alloy 25 Rod** (commonly known as **L605**, **Haynes 25**, or **UNS R30605**) is a solid-solution strengthened cobalt-chromium-tungsten-nickel superalloy supplied in rod and bar form. It is specifically engineered for applications demanding exceptional strength at high temperatures, outstanding oxidation resistance, and excellent wear performance. Supplied as rod, this product form is ideal for machining critical components, serving as feedstock for fasteners, or being used directly in high-stress structural applications. Unlike precipitation-hardened alloys, L605 derives its strength directly from its alloying elements, providing remarkable microstructural stability and resistance to age-embrittlement after prolonged exposure to extreme temperatures. #### **2. Chemical Composition (Typical Weight %)** The composition is meticulously controlled to ensure consistent performance in rod form. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Cobalt (Co)** | Balance | Provides the base matrix and solid-solution strength; imparts inherent wear resistance. | | **Chromium (Cr)** | 19.0 - 21.0 | Confers outstanding oxidation and hot corrosion resistance. | | **Tungsten (W)** | 14.0 - 16.0 | Primary solid-solution strengthener; significantly enhances high-temperature strength. | | **Nickel (Ni)** | 9.0 - 11.0 | Stabilizes the FCC (face-centered cubic) structure, improving ductility and fabricability. | | **Iron (Fe)** | 3.0 max | Impurity control. | | **Manganese (Mn)** | 1.0 - 2.0 | Aids in sulfur control and improves hot workability. | | **Silicon (Si)** | 0.30 - 0.60 | Deoxidizer during melting; improves oxidation resistance. | | **Carbon (C)** | 0.05 - 0.15 | Forms carbides for improved wear resistance and modest grain boundary strengthening. | | **Phosphorus (P)** | 0.03 max | Impurity control. | | **Sulfur (S)** | 0.03 max | Impurity control. | #### **3. Physical Properties** | Property | Value / Condition | | :--- | :--- | | **Density** | 9.13 g/cm³ (0.330 lb/in³) | | **Melting Point** | ~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 Condition Rod)** * **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 Capability:** * Designed to retain high tensile and creep strength up to **980°C (1800°F)**. * Exhibits excellent stress-rupture properties, making it suitable for load-bearing components in hot sections. #### **5. International Standards & Specifications for Rod** Alloy 25 / L605 rod is covered by key international standards, with **AMS 5759** being the primary specification for aerospace bar and forgings. | Standard Organization | Standard Designation | Form / Description | | :--- | :--- | :--- | | **Aerospace (SAE/AMS)** | **AMS 5759** | **Bar, Forgings, and Rings** (The primary specification for rod) | | **ASTM International** | **ASTM F90** | Bar, Wire, Sheet, Strip, and Plate | | **Unified Numbering System (UNS)** | **UNS R30605** | All Forms | | **European (EN)** | **2.4964** (Material Number) | - | **Note for Procurement:** Rod is typically supplied in the annealed condition, ready for machining and subsequent forming. Certifications will confirm compliance with the required standard (e.g., AMS 5759). #### **6. Product Applications for Rod Form** L605 rod is the preferred starting material for manufacturing critical components across several high-performance industries: * **Aerospace & Gas Turbine Engines:** * **Engine Shafts and Pins** * **Turbine Spacers and Seals** (machined from rod) * **Fuel Nozzle Components** * **Actuator Parts** * **Bolt Stock for High-Temperature Fasteners** * **Medical Devices:** * **Orthopedic Implants:** Machined into load-bearing components such as hip and knee stems, leveraging its high strength, corrosion resistance, and biocompatibility. * **Trauma Implants:** Bone screws and plates. * **Industrial & Chemical Processing:** * **Valve Components** (stems, seats) * **Heat Treatment Fixtures** (rods used for jigs and fixtures) * **Pump Shafts** for corrosive and high-temperature service. * **General Machining:** * Used for prototyping and manufacturing parts that must withstand severe thermal and mechanical stress. #### **7. Fabrication & Machining Notes for Rod** * **Machining:** Can be machined using conventional methods, but it is a gummy and work-hardening material. Positive rake angles, sharp tools, and rigid setups are recommended. Carbide or ceramic tooling is often used for production. * **Heat Treatment:** Rod is typically supplied in the annealed condition for optimal machinability. It is hardened only by cold working. * **Welding:** Readily weldable using TIG, MIG, and resistance welding processes. Matching filler metal (e.g., L605 wire) is recommended. * **Forging:** Can be hot-forged in the range of 1175°C - 1230°C (2150°F - 2250°F). --- **Disclaimer:** This data sheet is for informational purposes only. The information is representative and not guaranteed. For specific design and procurement, always consult the official specifications (e.g., AMS 5759) and the material producer's latest data and certifications.

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 2197 gallon liquid totes Special package is available on request.