Alloy 188,Udimet 188 Sheet,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 Sheet / UNS R30188** **Cobalt-Chromium-Nickel-Tungsten Superalloy Sheet Product** --- ### **1. Product Overview** Alloy 188 Sheet (commercially known as Udimet 188 Sheet or Haynes 188 Sheet, UNS R30188) is a cobalt-based superalloy supplied in thin sheet form, offering exceptional high-temperature strength and outstanding oxidation resistance. This product is specifically designed for applications requiring lightweight yet durable components capable of withstanding temperatures up to **1100°C (2012°F)**, while maintaining excellent formability and weldability for fabrication into complex geometries. --- ### **2. Chemical Composition (Weight %)** | Element | Content (%) | Key Characteristics | |---------|-------------|---------------------| | Cobalt (Co) | Balance | High-temperature stability | | Chromium (Cr) | 20.0–24.0 | Oxidation resistance | | Nickel (Ni) | 20.0–24.0 | Austenitic stabilization | | Tungsten (W) | 13.0–15.0 | Solid-solution strengthening | | Lanthanum (La) | 0.03–0.12 | Scale adhesion | | Iron (Fe) | ≤ 3.0 | Residual | | Manganese (Mn) | ≤ 1.25 | Hot workability | | Silicon (Si) | ≤ 0.20 | Residual | | Carbon (C) | 0.05–0.15 | Carbide formation | | Boron (B) | ≤ 0.015 | Grain boundary strength | --- ### **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** **Room Temperature (Annealed Condition):** - Tensile Strength: 965 MPa (140 ksi) minimum - Yield Strength (0.2% Offset): 485 MPa (70 ksi) minimum - Elongation: 50% minimum - Hardness: 85–100 HRB **Elevated Temperature Performance:** - Useful operating range: up to 1100°C (2012°F) - Stress Rupture Strength: 48 MPa at 980°C/100 hours - Excellent thermal fatigue resistance - Good creep resistance at elevated temperatures --- ### **5. Product Specifications** **Available Sizes:** - Thickness: 0.3 mm to 6.0 mm (0.012" to 0.236") - Width: 600 mm to 1500 mm (24" to 59") - Length: 1000 mm to 3000 mm (39" to 118") **Surface Conditions:** - Annealed and pickled - Bright annealed - Polished finishes available **Tolerances:** - Thickness: ±5% standard - Width: ±2 mm - Length: ±3 mm --- ### **6. Applications** **Aerospace & Defense:** - Combustion chamber liners - Afterburner components - Exhaust system parts - Heat shields - Turbine shrouds **Industrial Processing:** - Furnace liners and muffles - Heat treatment fixtures - Radiant tubes - Heat exchanger components **Power Generation:** - Gas turbine components - Combustion systems - Hot gas path components --- ### **7. International Standards** | Standard Type | Standard Number | Description | |---------------|-----------------|-------------| | UNS | R30188 | Material designation | | ASTM | B435 | Sheet, Strip, and Plate | | AMS | 5772 | Sheet, Strip, and Plate | | ASME | SB-435 | Pressure vessel applications | | EN/DIN | 2.4684 | European designation | --- ### **8. Fabrication Characteristics** **Forming:** - Excellent cold formability in annealed condition - Hot working temperature: 1170–1230°C - Minimum bend radius: 2T (annealed condition) **Welding:** - GTAW, GMAW, and resistance welding suitable - Use AWS A5.13 ERCoCr-A filler metal - Post-weld heat treatment recommended **Machining:** - Use slow speeds and heavy feeds - Carbide tools recommended - Adequate coolant required --- ### **9. Quality Assurance** - Mill certification to ASTM/AMS standards - Ultrasonic testing available - Chemical and mechanical property certification - Surface quality inspection --- ### **10. Technical Advantages** - Superior high-temperature strength maintenance - Excellent oxidation and sulfidation resistance - Outstanding thermal fatigue resistance - Good formability and weldability - Long service life in extreme environments --- **Note:** This data represents typical values and characteristics. Specific properties may vary depending on manufacturing processes and heat treatment. Consult with our technical team for application-specific recommendations and detailed technical support.

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 2241 gallon liquid totes Special package is available on request.