Alloy 25 / L605,Udimet L605 Pipe,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 Pipe (UNS R30605)** **High-Temperature Corrosion-Resistant Cobalt-Based Alloy Pipe** --- #### **1. Overview & Designation Clarification** **CORRECT DESIGNATIONS:** - **Alloy 25, L605, Haynes 25** - Standard commercial names - **UNS R30605** - Correct Unified Numbering System designation - **ASTM B574** - Primary pipe specification **DESIGNATION CORRECTION:** - "Udimet L605" is incorrect - Udimet alloys are nickel-based - "UNS W73605" is incorrect for this material Alloy 25 Pipe is a solid-solution strengthened cobalt-based superalloy designed for high-temperature piping systems requiring exceptional oxidation resistance, excellent structural stability, and superior strength in corrosive environments. --- #### **2. Chemical Composition (Typical Weight %)** | Element | Content (%) | Role in the Alloy | |---------|-------------|-------------------| | **Cobalt (Co)** | Balance | Base matrix providing solid-solution strength | | **Chromium (Cr)** | 19.0 - 21.0 | Oxidation and corrosion resistance | | **Tungsten (W)** | 14.0 - 16.0 | Primary solid-solution strengthener | | **Nickel (Ni)** | 9.0 - 11.0 | Stabilizes FCC structure | | **Iron (Fe)** | 3.0 max | Impurity control | | **Manganese (Mn)** | 1.0 - 2.0 | Hot workability improvement | | **Silicon (Si)** | 0.30 - 0.60 | Oxidation resistance | | **Carbon (C)** | 0.05 - 0.15 | Carbide formation | --- #### **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** **Pipe (Annealed Condition):** - **Tensile Strength**: 950 - 1200 MPa - **0.2% Yield Strength**: 450 - 600 MPa - **Elongation**: 50 - 60% - **Hardness**: HRB 95 - 105 **Pressure-Temperature Rating:** - **Max Working Pressure**: Varies with size and temperature - **Temperature Range**: -185°C to 1150°C - **Creep Resistance**: Excellent to 980°C --- #### **5. International Standards & Specifications** | Standard | Description | Product Form | |----------|-------------|---------------| | **ASTM B574** | Seamless and welded pipe | All pipe sizes | | **ASME SB-574** | ASME acceptance | Pressure applications | | **AMS 5537** | Sheet, strip, plate (material reference) | - | | **UNS R30605** | Correct UNS designation | All forms | | **EN 2.4964** | European material number | All forms | --- #### **6. Product Applications** **Aerospace & Defense:** - Gas turbine engine fuel lines - Hydraulic and pneumatic systems - Afterburner fuel manifolds - High-temperature exhaust systems **Power Generation:** - Gas turbine fuel systems - Heat exchanger tubing - High-temperature instrumentation - Boiler and steam systems **Industrial Processing:** - Chemical reactor piping - High-temperature furnace systems - Thermal fluid transfer lines - Semiconductor processing equipment --- #### **7. Pipe Specifications** **Seamless Pipe:** - **Size Range**: 1/8" to 12" NPS - **Wall Thickness**: Schedule 5S to XXS - **Length**: Random (6-7m) or cut lengths **Welded Pipe:** - **Size Range**: 1/8" to 24" NPS - **Welding Method**: TIG welded - **Testing**: 100% nondestructive examination **Pipe Specifications:** - **Standards**: ASTM B574, ASME SB-574 - **Grades**: Seamless, welded - **Ends**: Plain end, beveled end, threaded --- #### **8. Fabrication & Installation** **Welding & Joining:** - Excellent weldability - TIG welding recommended - Use L605 filler wire - Post-weld heat treatment optional **Forming & Bending:** - Cold bending capability - Hot bending above 1000°C - Minimum bend radii per ASTM standards **Installation:** - Standard piping practices apply - Compatible with L605 fittings - Support spacing per ASME B31.3 --- #### **9. Quality Assurance** **Testing & Certification:** - Hydrostatic testing per ASTM standards - Nondestructive examination - Chemical analysis certification - Mechanical properties certification - Full traceability **Compliance:** - ASTM B574 requirements - ASME Boiler and Pressure Vessel Code - PED 2014/68/EU (when specified) - Customer-specific requirements --- **Important Note**: This datasheet provides accurate technical data for genuine **Alloy 25/L605/Haynes 25 Pipe (UNS R30605)**. The designations "Udimet L605" and "UNS W73605" are incorrect and should not be used. Always verify material certifications against ASTM B574 for critical piping 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 2212 gallon liquid totes Special package is available on request.