Alloy 25 / L605,Udimet L605 ,UNS W73605,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 (UNS R30605)** **Clarification of Designations and Technical Specifications** --- #### **1. Overview & Designation Clarification** **Important Note on Designations:** - **Alloy 25**, **L605**, and **Haynes 25** are the correct commercial names for this cobalt-based superalloy - **UNS R30605** is the correct Unified Numbering System designation - **"Udimet L605"** is not a standard designation - Udimet alloys are typically nickel-based superalloys (e.g., Udimet 500, Udimet 720) - **"UNS W73605"** is incorrect for this alloy - W73605 refers to a different material system This datasheet provides accurate technical information for the genuine **Alloy 25/L605/Haynes 25 (UNS R30605)**. --- #### **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 | | **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 | | **Modulus of Elasticity** | 242 GPa (35 x 10^6 psi) | --- #### **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% - **Reduction of Area**: 55 - 70% - **Hardness**: Rockwell B 95 - 105 **Elevated Temperature Properties**: - **Stress Rupture Strength (980°C/1800°F)**: 35 MPa (5 ksi) for 100 hours - **Creep Strength (870°C/1600°F)**: 70 MPa (10 ksi) for 1% creep in 10,000 hours - **Oxidation Resistance**: Excellent up to 1150°C (2100°F) --- #### **5. Correct International Standards & Specifications** | Standard Organization | Standard Designation | Description | |----------------------|----------------------|-------------| | **ASTM International** | **ASTM F90** | Wrought cobalt-20chromium-15tungsten-10nickel alloy | | **Aerospace (SAE/AMS)** | **AMS 5537** | Sheet, strip, and plate | | **Aerospace (SAE/AMS)** | **AMS 5759** | Bars, forgings, and rings | | **Unified Numbering System** | **UNS R30605** | Correct UNS designation | | **European (EN)** | **2.4964** | Material number | | **ASME** | **SB-574** | Seamless and welded pipe and tube | --- #### **6. Product Applications** **Aerospace & Defense**: - Gas turbine engine components - Combustion chambers and afterburners - Turbine blades and vanes - Exhaust system components - Missile and rocket components **Power Generation**: - Gas turbine components - Heat exchanger tubing - High-temperature fasteners - Steam turbine parts **Industrial Applications**: - Heat treatment fixtures - Chemical processing equipment - Nuclear reactor components - High-temperature tooling **Medical Applications**: - Orthopedic implants - Surgical instruments - Dental components --- #### **7. Comparison with Udimet Alloys** | Property | Alloy 25/L605 (Co-based) | Udimet 500 (Ni-based) | Udimet 700 (Ni-based) | |----------|--------------------------|---------------------|---------------------| | **Base Element** | Cobalt | Nickel | Nickel | | **Strengthening Mechanism** | Solid solution | Precipitation hardening | Precipitation hardening | | **Max Service Temperature** | 1150°C | 980°C | 1040°C | | **Oxidation Resistance** | Excellent | Very Good | Excellent | | **Wear Resistance** | Excellent | Good | Good | --- #### **8. Fabrication Characteristics** **Machining**: - More difficult to machine than austenitic stainless steels - Use positive rake angles and rigid setups - Carbide tooling recommended for production - Adequate cooling and lubrication required **Welding**: - Excellent weldability using TIG, MIG, and resistance methods - Use matching composition filler metal (L605 wire) - Preheating generally not required **Forming**: - Good hot working characteristics - Hot working temperature: 1150-1200°C (2100-2190°F) - Good cold forming in annealed condition --- #### **9. Quality Assurance & Certification** - Certified to applicable ASTM, AMS, or ASME specifications - Full traceability from raw material to final product - Chemical analysis and mechanical testing reports - Non-destructive testing available (UT, PT, RT) - Compliance with NADCAP and other industry standards --- **Important Notice**: This datasheet provides accurate technical data for genuine **Alloy 25/L605/Haynes 25 (UNS R30605)**. The designations "Udimet L605" and "UNS W73605" are incorrect for this material. Always verify material certifications and designations 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 2209 gallon liquid totes Special package is available on request.