Alloy 25 / L605,Udimet L605 Bar(Round bar, Flat bar),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 Bar (UNS R30605)** **High-Temperature Cobalt-Based Superalloy Round Bar & Flat Bar** --- #### **1. Overview & Designation Clarification** **CORRECT DESIGNATIONS:** - **Alloy 25**, **L605**, **Haynes 25** - Commercial names - **UNS R30605** - Correct Unified Numbering System - **AMS 5759** - Primary bar specification **DESIGNATION CORRECTION:** - "Udimet L605" is incorrect - Udimet refers to nickel-based superalloys - "UNS W73605" is incorrect for this alloy Alloy 25 Bar is a solid-solution strengthened cobalt-chromium-tungsten-nickel superalloy offering exceptional high-temperature strength, outstanding oxidation resistance, and excellent structural stability for critical applications. --- #### **2. Chemical Composition (Typical Weight %)** | Element | Content (%) | Role in the Alloy | |---------|-------------|-------------------| | **Cobalt (Co)** | Balance | Base matrix providing solid-solution strength and wear resistance | | **Chromium (Cr)** | 19.0 - 21.0 | Exceptional oxidation and corrosion resistance | | **Tungsten (W)** | 14.0 - 16.0 | Primary solid-solution strengthener | | **Nickel (Ni)** | 9.0 - 11.0 | Stabilizes FCC structure, improves ductility | | **Iron (Fe)** | 3.0 max | Impurity control | | **Manganese (Mn)** | 1.0 - 2.0 | Enhances hot workability | | **Silicon (Si)** | 0.30 - 0.60 | Improves oxidation resistance | | **Carbon (C)** | 0.05 - 0.15 | Carbide formation for wear resistance | --- #### **3. Physical Properties** | Property | Value | |----------|-------| | **Density** | 9.13 g/cm³ | | **Melting Range** | 1330 - 1410°C | | **Thermal Conductivity** | 9.6 W/m·K (20°C) | | **Coefficient of Thermal Expansion** | 12.5 μm/m·K (20-100°C) | | **Specific Heat Capacity** | 420 J/kg·K | | **Electrical Resistivity** | 0.92 μΩ·m | | **Magnetic Permeability** | Essentially non-magnetic | --- #### **4. Mechanical Properties** **Round Bar & Flat Bar (Annealed Condition):** - **Tensile Strength**: 1000 - 1250 MPa - **0.2% Yield Strength**: 500 - 700 MPa - **Elongation**: 45 - 55% - **Reduction of Area**: 50 - 65% - **Hardness**: HRB 98 - 108 **High-Temperature Performance:** - **Maximum Service Temperature**: 1150°C (oxidizing atmospheres) - **Creep Resistance**: Excellent up to 980°C - **Oxidation Resistance**: Outstanding to 1150°C --- #### **5. International Standards & Specifications** | Standard | Description | Product Form | |----------|-------------|---------------| | **AMS 5759** | Bars, forgings, and rings | Round & Flat Bar | | **ASTM F90** | Wrought cobalt-chromium-tungsten alloy | All forms | | **ASME SB-574** | Bar and shape specifications | Round & Flat Bar | | **UNS R30605** | Correct UNS designation | All forms | | **EN 2.4964** | European material number | All forms | --- #### **6. Product Applications** **Aerospace & Defense:** - Gas turbine engine components - Turbine blades and vanes - Afterburner components - Missile structural parts - High-temperature fasteners **Power Generation:** - Gas turbine disks - Steam turbine components - Valve bodies and stems - Heat exchanger supports **Industrial Applications:** - Chemical processing equipment - Heat treatment fixtures - Nuclear reactor components - High-temperature tooling **Medical Applications:** - Orthopedic implants - Surgical instruments - Dental components --- #### **7. Bar Product Specifications** **Round Bar:** - **Diameter Range**: 5mm to 300mm - **Length**: 3-6 meters standard - **Tolerance**: h9 to h11 per ISO 286-2 - **Surface Finish**: Hot finished, turned, or centerless ground **Flat Bar:** - **Thickness**: 5mm to 100mm - **Width**: 20mm to 300mm - **Length**: 3-6 meters standard - **Edge Condition**: As-rolled, machined, or precision ground **Available Conditions:** - Annealed (standard) - Solution treated - Hot finished - Precision machined --- #### **8. Fabrication Characteristics** **Machining:** - Machinability rating: 25% of 1112 steel - Use positive rake carbide tools - Rigid setup required - Adequate cooling essential **Welding:** - Excellent weldability - TIG and MIG processes recommended - Use L605 filler wire - Preheating generally not required **Heat Treatment:** - **Solution Annealing**: 1175-1230°C - **Rapid Cooling**: Essential for properties - **Stress Relieving**: 870-900°C --- #### **9. Quality Assurance** **Certification & Testing:** - Mill certification to AMS 5759 - Chemical analysis report - Mechanical test reports - Ultrasonic testing available - Full traceability maintained **Compliance:** - NADCAP accredited testing - AS9100 quality system - OGP and customer specifications - RoHS and REACH compliant --- **Important Note**: This datasheet provides accurate data for genuine **Alloy 25/L605/Haynes 25 Bar (UNS R30605)**. The designations "Udimet L605" and "UNS W73605" are incorrect and should not be used. Always verify material certifications against AMS 5759 or ASTM F90 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 2211 gallon liquid totes Special package is available on request.