Alloy 25 / L605,Haynes 25 Foil,Shim,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 Foil & Shim Stock (UNS R30605)** **Precision Thin-Gauge Material for High-Temperature Sealing and Spacing Applications** --- #### **1. Overview** **Alloy 25 Foil and Shim Stock** (commercially known as **Haynes 25**, **L605**, or **UNS R30605**) represents the thin-gauge form of this premium cobalt-based superalloy, specifically engineered for precision sealing, spacing, and thermal management applications in extreme environments. These products combine the alloy's exceptional high-temperature capabilities with precise dimensional control and consistent mechanical properties. Available in ultra-thin foils and precision shims, this material maintains excellent oxidation resistance, high-temperature strength, and structural stability while providing the formability and consistency required for critical sealing and spacing applications in aerospace, energy, and industrial sectors. --- #### **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 | --- #### **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 | | **Maximum Service Temperature** | 1150°C (2100°F) in oxidizing atmospheres | --- #### **4. Mechanical Properties** **Foil Properties (Annealed Condition)**: - **Thickness Range**: 0.025 mm to 0.5 mm (0.001" to 0.020") - **Tensile Strength**: 900 - 1100 MPa (130 - 160 ksi) - **0.2% Yield Strength**: 400 - 550 MPa (58 - 80 ksi) - **Elongation**: 40 - 55% - **Hardness**: Rockwell B 85 - 100 **Shim Stock Properties**: - **Thickness Range**: 0.05 mm to 2.0 mm (0.002" to 0.080") - **Tensile Strength**: 950 - 1200 MPa (138 - 174 ksi) - **0.2% Yield Strength**: 450 - 600 MPa (65 - 87 ksi) - **Elongation**: 35 - 50% - **Hardness**: Rockwell B 90 - 105 **Special Characteristics**: - Excellent spring properties at elevated temperatures - Maintains clamping force under thermal cycling - Resists compression set and creep relaxation - Good formability and stamping characteristics --- #### **5. 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 foil | | **ASME** | **SB-574** | Thin sheet and foil specifications | | **Unified Numbering System** | **UNS R30605** | All product forms | | **European (EN)** | **2.4964** | Material number | --- #### **6. Product Applications** **Aerospace & Defense**: - Turbine case seals and gaskets - Combustor section shims - Exhaust system seals - Thermal barrier mounting shims - Compressor blade tip seals **Power Generation**: - Gas turbine clearance control shims - Heat exchanger sealing elements - Boiler and furnace gaskets - Turbine casing alignment shims **Industrial Applications**: - High-temperature furnace gaskets - Chemical processing equipment seals - Heat treatment fixture spacers - Precision instrumentation shims **Automotive & Racing**: - Turbocharger heat shields - Exhaust system gaskets - High-performance engine shims --- #### **7. Product Forms & Specifications** **Foil Products**: - **Width**: 50 mm to 600 mm (2" to 24") - **Tolerance**: ±0.005 mm (±0.0002") - **Surface Finish**: 0.2 - 0.8 μm Ra - **Condition**: Annealed or hard temper **Shim Stock**: - **Standard Sizes**: 300 mm × 300 mm to 1200 mm × 2400 mm - **Thickness Tolerance**: ±0.005 mm to ±0.025 mm - **Custom Shapes**: Laser cut, photo-etched, or stamped - **Surface**: Mill finish or special finishes available **Special Configurations**: - Pre-cut shim packs - Laminated shim assemblies - Perforated foil materials - Embossed or corrugated patterns --- #### **8. Fabrication & Handling** **Forming Characteristics**: - Excellent for bending and light forming - Suitable for stamping and blanking operations - Can be welded using TIG and laser methods - Annealing recommended between severe forming operations **Storage & Handling**: - Store in clean, dry conditions - Protect from surface contamination - Handle with clean gloves to prevent corrosion - Stack flat to prevent permanent deformation **Quality Assurance**: - 100% dimensional verification - Surface quality inspection - Lot traceability maintained - Certificates of compliance provided --- #### **9. Competitive Advantages** - Maintains dimensional stability at extreme temperatures - Superior to nickel alloys in sulfidation resistance - Better oxidation resistance than iron-based superalloys - Excellent balance of strength and formability - Consistent performance across temperature range --- **Note**: This technical data sheet provides typical values and characteristics. Specific properties may vary depending on thickness, temper condition, and manufacturing process. Consult with our technical team for application-specific recommendations and performance verification.

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 2207 gallon liquid totes Special package is available on request.