Alloy 188,Udimet 188 Foil,Shim,UNS R30188,E FORU

British Specs:，American Specs: AMS 5608 Sheet, Strip and Plate AMS 5801 Welding Wire，German Specs:

**Technical Data Sheet: Alloy 188 / Udimet 188 Foil & Shim / UNS R30188** **Cobalt-Chromium-Nickel-Tungsten Superalloy - Foil & Shim Products** --- ### **1. Product Overview** Alloy 188 Foil and Shim (commercially known as Udimet 188, Haynes 188, UNS R30188) are precision-rolled thin gauge products designed for applications requiring minimal thickness with maximum high-temperature performance. These products maintain the alloy's exceptional oxidation resistance and mechanical properties at temperatures up to **1100°C (2012°F)**, while offering excellent formability and precise dimensional control for critical sealing, spacing, and thermal management applications. --- ### **2. Chemical Composition (Weight %)** | Element | Content (%) | Key Characteristics | |---------|-------------|---------------------| | Cobalt (Co) | Balance | High-temperature matrix stability | | Chromium (Cr) | 20.0-24.0 | Oxidation & sulfidation resistance | | Nickel (Ni) | 20.0-24.0 | Austenitic structure stabilization | | Tungsten (W) | 13.0-15.0 | Solid-solution strengthening | | Lanthanum (La) | 0.03-0.12 | Oxide scale adhesion | | Iron (Fe) | ≤3.0 | Residual element | | Manganese (Mn) | ≤1.25 | Hot workability enhancement | | Silicon (Si) | ≤0.20 | Residual element | | Carbon (C) | 0.05-0.15 | Carbide strengthening | | Boron (B) | ≤0.015 | Grain boundary reinforcement | --- ### **3. Physical Properties** | Property | Value | Condition | |----------|-------|-----------| | Density | 9.13 g/cm³ | 25°C | | Melting Range | 1330-1380°C | - | | Thermal Conductivity | 10.1 W/m·K | 100°C | | Coefficient of Thermal Expansion | 12.3 μm/m·°C | 20-100°C | | Electrical Resistivity | 1.02 μΩ·m | 25°C | | Magnetic Permeability | Essentially non-magnetic | - | --- ### **4. Mechanical Properties** **Standard Properties (Annealed Condition):** - **Foil (0.025-0.15mm):** - Tensile Strength: 895-1100 MPa - Yield Strength: 415-550 MPa - Elongation: 35-45% - **Shim (0.15-0.5mm):** - Tensile Strength: 965-1200 MPa - Yield Strength: 485-690 MPa - Elongation: 45-55% **Elevated Temperature Performance:** - Continuous Service: Up to 1100°C - Stress Rupture Strength: 48 MPa at 980°C/100h - Excellent thermal fatigue resistance in thin sections --- ### **5. Product Specifications** **Dimensional Range:** - **Foil Thickness:** 0.025mm to 0.15mm (±0.002mm) - **Shim Thickness:** 0.15mm to 0.50mm (±0.005mm) - **Width Range:** 50mm to 600mm - **Standard Tolerance:** ±2% of thickness **Available Conditions:** - Annealed (Soft) - Maximum formability - Temper Rolled - Improved flatness - Solution Treated - Optimal high-temperature properties **Surface Finish:** - Standard Mill Finish - Bright Annealed - Special Polished (upon request) --- ### **6. Applications** **Aerospace & Defense:** - Turbine blade sealing shims - Combustion chamber gaskets - Heat shield layers - Exhaust system seals **Industrial Processing:** - Furnace gaskets and seals - Heat treatment fixture spacers - High-temperature sensor mounts - Vacuum system radiation shields **Electronics & Special Applications:** - Power semiconductor substrates - High-temperature heater elements - Thermocouple mounting pads - Laboratory equipment components --- ### **7. International Standards** | Standard Type | Standard Number | Application | |---------------|-----------------|-------------| | UNS | R30188 | Material designation | | ASTM | B435 | Sheet, Strip, and Foil | | AMS | 5772 | Sheet, Strip, and Plate | | ASTM | B248 | Tolerances for Strip Products | | EN/DIN | 2.4684 | European designation | | MIL | MIL-DTL-5037 | Foil and thin strip | --- ### **8. Fabrication Characteristics** **Forming & Processing:** - Excellent blanking and punching characteristics - Minimum bend radius: 1T (annealed condition) - Good stamping and deep drawing capability - Suitable for photochemical etching **Joining Methods:** - Resistance welding preferred - Laser welding suitable - High-temperature brazing compatible - Adhesive bonding with high-temp adhesives **Heat Treatment:** - Solution Annealing: 1230°C ± 15°C - Rapid cooling required - Stress relief available for specific applications --- ### **9. Quality Assurance** **Standard Testing:** - Dimensional verification - Surface quality inspection - Tensile testing by lot - Hardness testing - Chemical composition verification **Special Testing Available:** - Microstructural examination - Grain size measurement - Oxide scale adhesion testing - High-temperature stability testing --- ### **10. Technical Advantages** - **Precision thickness control** for critical applications - **Superior high-temperature strength** maintenance - **Excellent oxidation resistance** in thin sections - **Outstanding thermal fatigue resistance** - **Good formability** for complex shapes - **Consistent mechanical properties** throughout coils --- ### **11. Packaging & Handling** **Standard Packaging:** - Foil: Interleaved with protective paper, boxed - Shim: Separated with protective coating, crated - Custom packaging available **Handling Instructions:** - Clean, dry handling environment recommended - Avoid surface contamination - Store in moisture-controlled conditions --- **Note:** All foil and shim products are supplied with full material certification and traceability. Custom sizes, tolerances, and special processing are available upon request. Consult with our technical team for application-specific recommendations.

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 2246 gallon liquid totes Special package is available on request.