Alloy 25 / L605,Udimet L605 Tube,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 Tube (UNS R30605)** **High-Temperature Corrosion-Resistant Cobalt-Based Alloy Tubing** --- #### **1. Overview & Designation Clarification** **CORRECT DESIGNATIONS:** - **Alloy 25, L605, Haynes 25** - Standard commercial names - **UNS R30605** - Correct Unified Numbering System designation - **ASTM B574** - Primary tube specification **DESIGNATION CORRECTION:** - "Udimet L605" is incorrect - Udimet alloys are nickel-based superalloys - "UNS W73605" is incorrect for this material Alloy 25 Tube is a solid-solution strengthened cobalt-based superalloy tubing designed for high-temperature applications requiring exceptional oxidation resistance, excellent structural stability, and superior strength in corrosive environments. The tube form is particularly suited for heat exchangers, instrumentation, and fluid handling systems. --- #### **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 hot corrosion resistance | | **Tungsten (W)** | 14.0 - 16.0 | Primary solid-solution strengthener | | **Nickel (Ni)** | 9.0 - 11.0 | Stabilizes FCC structure, improves fabricability | | **Iron (Fe)** | 3.0 max | Impurity control | | **Manganese (Mn)** | 1.0 - 2.0 | Hot workability improvement | | **Silicon (Si)** | 0.30 - 0.60 | Oxidation resistance enhancement | | **Carbon (C)** | 0.05 - 0.15 | Carbide formation for grain boundary strength | --- #### **3. Physical Properties** | Property | Value | |----------|-------| | **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) | | **Specific Heat Capacity** | 420 J/kg·K (at 20°C) | | **Electrical Resistivity** | 0.92 μΩ·m | | **Magnetic Permeability** | Essentially non-magnetic | --- #### **4. Mechanical Properties** **Tubing (Annealed Condition):** - **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:** - **Maximum Service Temperature**: 1150°C (2100°F) in oxidizing atmospheres - **Creep Resistance**: Excellent up to 980°C (1800°F) - **Pressure Rating**: Varies with tube dimensions and temperature --- #### **5. International Standards & Specifications** | Standard | Description | Product Form | |----------|-------------|---------------| | **ASTM B574** | Seamless and welded tube | All tube sizes | | **ASME SB-574** | ASME acceptance | Pressure applications | | **AMS 5796** | Welding wire (for tube fabrication) | - | | **UNS R30605** | Correct UNS designation | All forms | | **EN 2.4964** | European material number | All forms | --- #### **6. Product Applications** **Aerospace & Defense:** - Gas turbine engine fuel and hydraulic lines - Instrumentation and sensing tubing - Afterburner fuel manifolds - Environmental control systems - Heat exchanger tubing **Power Generation:** - Heat exchanger tubes - Boiler tubes - Superheater and reheater tubes - Instrumentation tubing for turbines **Industrial Processing:** - Heat exchanger tubing - Thermocouple protection sheaths - Chemical processing equipment - Furnace and heat treatment components **Medical & Specialty:** - Medical gas delivery systems - Pharmaceutical processing equipment - Semiconductor manufacturing --- #### **7. Tube Specifications** **Seamless Tube:** - **Outside Diameter**: 1.6 mm to 100 mm (1/16" to 4") - **Wall Thickness**: 0.5 mm to 10 mm - **Length**: Up to 15 meters custom lengths **Welded Tube:** - **Outside Diameter**: 6 mm to 150 mm (1/4" to 6") - **Wall Thickness**: 0.8 mm to 5 mm - **Welding Method**: TIG welded, 100% inspected **Tube Types:** - **Hydraulic Tubing**: Precision dimensions - **Instrumentation Tubing**: Small diameters - **Heat Exchanger Tubing**: Optimized for thermal transfer - **Structural Tubing**: Mechanical applications --- #### **8. Fabrication & Joining** **Welding & Joining:** - Excellent weldability using TIG process - Recommended filler: L605 welding wire - Suitable for orbital welding - Post-weld heat treatment generally not required **Forming & Bending:** - Cold bending capability - Minimum bend radius: 2 x OD (annealed condition) - Hot bending possible for tight radii - Flaring and flanging capabilities **Cutting & Preparation:** - Machine cutting recommended - Deburring required for fluid applications - Clean room packaging available --- #### **9. Quality Assurance** **Testing & Certification:** - Hydrostatic pressure testing - Eddy current or ultrasonic testing - Dimensional verification - Surface finish inspection - Chemical and mechanical certification **Quality Standards:** - ASTM B574 compliance - ASME BPVC Section II - NADCAP accreditation available - Cleanliness per customer requirements --- **Important Note**: This datasheet provides accurate technical data for genuine **Alloy 25/L605/Haynes 25 Tube (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 tubing applications. Consult with engineering for specific pressure-temperature ratings and application suitability.

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 2213 gallon liquid totes Special package is available on request.