Alloy 188,Udimet 188 Strip,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 Strip / UNS R30188** **Cobalt-Chromium-Nickel-Tungsten Superalloy Strip Product** --- #### **1. Product Overview** **Alloy 188 Strip** (commercially known as **Udimet 188 Strip** or **Haynes 188 Strip**, UNS R30188) is a precision-rolled cobalt-based superalloy supplied in strip form for applications requiring thin gauge materials with exceptional high-temperature performance. This product combines outstanding oxidation resistance with excellent mechanical properties at temperatures up to **1100°C (2012°F)**, while offering superior dimensional accuracy and surface quality for precision manufacturing applications. --- #### **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** **Standard Properties (Annealed Condition):** - **Tensile Strength**: 895–1100 MPa (130–160 ksi) - **Yield Strength (0.2% Offset)**: 415–550 MPa (60–80 ksi) - **Elongation**: 35–50% - **Hardness**: 70–90 HRB **Elevated Temperature Performance:** - **Continuous Service**: Up to 1100°C (2012°F) - **Stress Rupture Strength**: 48 MPa at 980°C/100h - **Thermal Fatigue Resistance**: Excellent in thin sections | --- #### **5. Product Specifications** **Strip Dimensions:** - **Thickness**: 0.05 mm to 2.0 mm (0.002" to 0.079") - **Width**: 10 mm to 600 mm (0.394" to 23.6") - **Length**: Coils up to 1000 meters, cut lengths available **Tolerance Standards:** - **Thickness Tolerance**: ±0.005 mm for precision grades - **Width Tolerance**: ±0.1 mm for slit edges - **Camber**: 1 mm per meter maximum **Available Conditions:** - **Annealed**: Optimal for forming and stamping - **Temper Rolled**: Improved flatness and surface finish - **Solution Treated**: Maximum high-temperature properties | --- #### **6. Applications** **Precision Components:** - Turbine blade seals and shims - Combustion chamber gaskets - High-temperature spring components - Electrical heating element supports **Electronic & Electrical:** - Lead frames for high-temperature electronics - Battery component supports - Power semiconductor substrates - Thermocouple compensation leads **Industrial Processing:** - Furnace conveyor belts - Heat treatment fixture components - Vacuum furnace shielding - High-temperature filter elements **Automotive & Aerospace:** - Exhaust system gaskets - Turbocharger heat shields - Engine sensor mounts - Thermal protection systems | --- #### **7. International Standards** | Standard Type | Standard Number | Specification | |---------------|-----------------|---------------| | **UNS** | R30188 | Material designation | | **ASTM** | B435 | Sheet, Strip, and Plate | | **AMS** | 5772 | Sheet, Strip, and Plate | | **ASTM** | B248 | Tolerances for Strip Products | | **EN/DIN** | 2.4684 | European designation | | **ISO** | 9445 | Cold-rolled stainless steel strip | --- #### **8. Fabrication Characteristics** **Forming & Stamping:** - **Blankability**: Excellent in annealed condition - **Minimum Bend Radius**: 1T for 90° bends - **Punch Clearance**: 5–8% of material thickness - **Springback**: 10–15% typical **Joining Methods:** - **Resistance Welding**: Excellent suitability - **Laser Welding**: Preferred for precision joints - **Brazing**: Using nickel-based filler metals - **Adhesive Bonding**: With high-temperature adhesives **Surface Treatments:** - **Pickling**: For oxide removal - **Passivation**: For improved corrosion resistance - **Special Coatings**: Available for specific applications | --- #### **9. Quality Assurance** **Standard Testing:** - Dimensional verification with laser scanners - Surface roughness measurement - Tensile testing by lot - Hardness testing per ASTM E18 **Special Testing Available:** - Microstructural examination - Grain size measurement per ASTM E112 - Oxide scale adhesion testing - High-temperature stability testing --- #### **10. Technical Advantages** - **Precision thickness control** for consistent manufacturing - **Superior surface quality** for critical applications - **Excellent high-temperature strength** maintenance - **Outstanding oxidation resistance** in thin sections - **Good formability** for complex component shapes - **Consistent mechanical properties** throughout coils --- **Contact Information:** For technical specifications, sample requests, and application engineering support for Udimet 188 Strip products, please contact our precision strip specialists for comprehensive 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 2242 gallon liquid totes Special package is available on request.