Alloy 25 / L605,Haynes 25 Bar(Round bar, Flat bar),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 Bar (UNS R30605)** **Round Bar & Flat Bar - High-Performance Cobalt-Based Superalloy for Machining and High-Temperature Service** #### **1. Overview** **Alloy 25 Bar** (commercially known as **Haynes 25**, **L605**, or **UNS R30605**) is a solid-solution strengthened cobalt-chromium-tungsten-nickel superalloy supplied in the form of **round bars** and **flat bars**. This product form is engineered as the primary stock material for machining, forging, and fabricating components that must withstand extreme environments. Renowned for its exceptional combination of high-temperature strength, outstanding oxidation resistance, and excellent wear performance, Alloy 25 bar is a versatile and reliable choice for the most demanding applications in aerospace, medical, and industrial sectors. Its solid-solution strengthened nature ensures microstructural stability, preventing age-embrittlement during long-term service. #### **2. Chemical Composition (Typical Weight %)** The composition is balanced to deliver optimal performance for bar stock destined for critical components. | Element | Content (%) | Role in the Alloy | | :--- | :--- | :--- | | **Cobalt (Co)** | Balance | Forms the base matrix; provides solid-solution strength and inherent wear resistance. | | **Chromium (Cr)** | 19.0 - 21.0 | Imparts exceptional resistance to oxidation and hot corrosion. | | **Tungsten (W)** | 14.0 - 16.0 | Primary solid-solution strengthener; significantly boosts high-temperature strength. | | **Nickel (Ni)** | 9.0 - 11.0 | Stabilizes the face-centered cubic (FCC) structure, enhancing ductility and fabricability. | | **Iron (Fe)** | 3.0 max | Impurity control. | | **Manganese (Mn)** | 1.0 - 2.0 | Improves hot workability and aids in sulfur control. | | **Silicon (Si)** | 0.30 - 0.60 | Acts as a deoxidizer; enhances oxidation resistance. | | **Carbon (C)** | 0.05 - 0.15 | Forms carbides to enhance wear resistance and provide 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 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 Condition Bar)** * **Room Temperature Tensile Properties (Typical for Annealed Bar):** * **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:** * Retains significant mechanical strength and exhibits excellent creep resistance at temperatures up to **980°C (1800°F)**. * Outstanding oxidation resistance makes it suitable for continuous service in air up to **1150°C (2100°F)**. #### **5. International Standards & Specifications for Bar** Alloy 25 / L605 bar conforms to strict international standards, ensuring quality and performance for critical applications. | Standard Organization | Standard Designation | Form / Description | | :--- | :--- | :--- | | **Aerospace (SAE/AMS)** | **AMS 5759** | **Bar, Forgings, and Rings** (The primary aerospace specification) | | **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:** Bars are typically supplied in the annealed condition, which is ideal for subsequent machining and fabrication. #### **6. Product Applications for Bar Form** The bar form is the foundational material for manufacturing a wide range of high-performance components. * **Aerospace & Gas Turbine Engines:** * **Shafts and Pins** * **Turbine Spacers and Seals** (machined from round bar) * **Actuator Components** * **Fastener Stock** for high-temperature bolts and studs * **Fuel Nozzle Bodies** * **Medical Devices:** * **Orthopedic Implants:** Machined from round bar into critical load-bearing components such as hip stems, knee replacements, and trauma implants. * **Surgical Instruments:** For specialized tools requiring high strength and corrosion resistance. * **Industrial & Chemical Processing:** * **Valve Components** (stems, trim) for severe service. * **Pump Shafts** and sleeves. * **Heat Treatment Fixtures:** Round and flat bars used for furnace trays, baskets, and jigs. * **Extrusion Dies** and components. * **General Engineering:** * Used for prototypes and parts requiring a combination of high strength, wear resistance, and thermal stability. #### **7. Fabrication & Machining Notes** * **Machining:** Alloy 25 is a gummy and work-hardening material. Successful machining requires: * **Sharp, positive rake angle tools.** * **Rigid tooling and workpiece setup.** * **Moderate to slow speeds with consistent feed.** * **Carbide tooling is preferred for production runs.** * **Heat Treatment:** Supplied in the annealed condition. It can be hardened only by cold working. * **Welding:** Excellent weldability using common techniques like TIG and MIG. Use L605 filler wire for best results. * **Forging:** Hot forge in the range of **1175°C - 1230°C (2150°F - 2250°F)**. --- **Disclaimer:** This data sheet is for informational purposes only. Properties can vary based on bar size and processing history. For specific design and procurement, always consult the official specifications (e.g., AMS 5759) and the material producer's latest technical data sheets 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 2198 gallon liquid totes Special package is available on request.