Alloy 188,Udimet 188 Plate,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 Plate / UNS R30188** **Cobalt-Chromium-Nickel-Tungsten Superalloy Plate Product** --- #### **1. Product Overview** **Alloy 188 Plate** (commercially known as **Udimet 188 Plate** or **Haynes 188 Plate**, UNS R30188) is supplied in plate form for high-temperature structural applications requiring exceptional strength and environmental resistance. This product maintains outstanding mechanical properties and oxidation resistance at temperatures up to **1100°C (2012°F)**, making it ideal for fabrication of large components in aerospace, power generation, and industrial processing equipment. --- #### **2. Chemical Composition (Weight %)** | Element | Content (%) | Metallurgical Function | |---------|-------------|------------------------| | **Cobalt (Co)** | Balance | High-temperature matrix stability | | **Chromium (Cr)** | 20.0–24.0 | Oxidation and 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 enhancement | | **Iron (Fe)** | ≤ 3.0 | Residual element | | **Manganese (Mn)** | ≤ 1.25 | Hot workability improvement | | **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 | |----------|-------| | **Density** | 9.13 g/cm³ (0.330 lb/in³) | | **Melting Range** | 1330–1380°C (2426–2516°F) | | **Thermal Conductivity** | 10.1 W/m·K at 100°C | | **Mean CTE (20-100°C)** | 12.3 µm/m·°C | | **Electrical Resistivity** | 1.02 µΩ·m at 21°C | | **Magnetic Permeability** | Essentially non-magnetic | --- #### **4. Mechanical Properties** **Room Temperature (Solution Annealed):** - **Tensile Strength**: 965 MPa min (140 ksi min) - **Yield Strength (0.2% Offset)**: 485 MPa min (70 ksi min) - **Elongation**: 50% min - **Hardness**: 85–100 HRB **Elevated Temperature Performance:** - **Stress Rupture Strength**: 48 MPa at 980°C/100h - **Creep Strength**: 35 MPa at 1000°C/1000h - **Thermal Fatigue Resistance**: Excellent --- #### **5. Product Specifications** **Plate Size Range:** - **Thickness**: 5 mm to 100 mm (0.187" to 4") - **Width**: 1000 mm to 2000 mm (39" to 79") - **Length**: 2000 mm to 6000 mm (79" to 236") **Available Conditions:** - **Hot Rolled**: As-rolled condition - **Solution Annealed**: Optimal for fabrication - **Stress Relieved**: For dimensional stability - **Surface Finished**: Pickled, ground, or mill finished **Tolerance Standards:** - **Thickness Tolerance**: ±5% standard, ±3% special - **Flatness**: 5 mm/m maximum - **Shearing Tolerance**: ±2 mm --- #### **6. Applications** **Aerospace & Defense:** - Combustion chamber liners - Afterburner components - Exhaust system ducting - Engine mounting plates **Industrial Processing:** - Heat treatment furnace components - Radiant heater panels - Chemical reactor liners - Pyroprocessing equipment **Power Generation:** - Gas turbine casings - Heat recovery system ducting - Boiler component panels - Nuclear reactor internal components **Special Applications:** - Hot forming dies and tools - High-temperature fixture plates - Thermal processing equipment bases --- #### **7. International Standards** | Standard Type | Standard Number | Specification | |---------------|-----------------|---------------| | **UNS** | R30188 | Material designation | | **ASTM** | B435 | Plate, Sheet, and Strip | | **AMS** | 5772 | Sheet, Strip, and Plate | | **ASME** | SB-435 | Boiler and Pressure Vessel Code | | **EN/DIN** | 2.4684 | European designation | | **ISO** | 6208 | Plate products | --- #### **8. Fabrication & Processing** **Cutting & Machining:** - **Plasma Cutting**: Recommended for thick plates - **Water Jet Cutting**: Suitable for complex shapes - **Machining Parameters**: Use positive rake carbide tools - **Cutting Speeds**: 10-20 m/min for milling operations **Forming Operations:** - **Hot Forming**: 1170-1230°C (2140-2250°F) - **Cold Forming**: Good in annealed condition - **Minimum Bend Radius**: 3T for 90° bends - **Springback Allowance**: 10-15% **Welding Procedures:** - **Processes**: GTAW, GMAW, SMAW - **Filler Metal**: AWS A5.13 ERCoCr-A - **Preheat**: Not required - **Post-Weld Heat Treatment**: Solution anneal recommended --- #### **9. Quality Assurance** **Standard Testing:** - Ultrasonic testing per ASTM A578 - Tensile testing per ASTM E8 - Hardness testing per ASTM E18 - Chemical analysis certification **Additional Testing Available:** - Macro-etch examination - Charpy impact testing - High-temperature tensile testing - Stress rupture testing --- #### **10. Technical Advantages** - **Superior high-temperature strength** retention - **Excellent oxidation resistance** in air and combustion atmospheres - **Good thermal fatigue resistance** for cyclic applications - **Maintains structural integrity** under thermal stress - **Proven performance** in critical high-temperature applications - **Available in large sizes** for fabricating substantial components --- **Contact Information:** For technical specifications, cutting services, and fabrication support for Udimet 188 Plate applications, please contact our plate products specialists for comprehensive engineering assistance.

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 2240 gallon liquid totes Special package is available on request.