Alloy 188,Udimet 188 Pipe,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 Pipe / UNS R30188** **Cobalt-Chromium-Nickel-Tungsten Superalloy Pipe Product** --- #### **1. Product Overview** **Alloy 188 Pipe** (commercially known as **Udimet 188 Pipe** or **Haynes 188 Pipe**, UNS R30188) is engineered for high-temperature piping systems requiring exceptional oxidation resistance and structural stability. This product maintains excellent mechanical properties and corrosion resistance in temperatures up to **1100°C (2012°F)**, making it ideal for critical fluid and gas handling applications in aggressive environments. --- #### **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 (Annealed Condition):** - **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 - **Maximum Working Pressure**: Varies with temperature and pipe size --- #### **5. Product Specifications** **Pipe Size Range:** - **Outside Diameter**: 6 mm to 300 mm (0.25" to 12") - **Wall Thickness**: Schedule 5S to XXS - **Length**: Random 3-7 meters, cut lengths per requirement **Manufacturing Processes:** - **Seamless Pipe**: ASTM B622 for maximum integrity - **Welded Pipe**: ASTM B619 for larger diameters - **Surface Finish**: Pickled, polished, or as-drawn **Pressure Ratings:** - **ASME B31.3**: Compliant for process piping - **Temperature-Pressure Ratings**: Available upon request --- #### **6. Applications** **Aerospace & Defense:** - Jet engine exhaust ducts - Afterburner fuel lines - Environmental control systems - Hydraulic line protection sleeves **Industrial Processing:** - Heat treatment furnace piping - Chemical process transfer lines - Nuclear reactor instrumentation lines - Thermal oxidizer systems **Power Generation:** - Gas turbine fuel manifolds - Heat recovery steam generator tubing - High-temperature steam lines - Exhaust gas recirculation systems --- #### **7. International Standards** | Standard Type | Standard Number | Specification | |---------------|-----------------|---------------| | **UNS** | R30188 | Material designation | | **ASTM** | B622 | Seamless Pipe and Tube | | **ASTM** | B619 | Welded Pipe | | **ASME** | SB-622 | Boiler and Pressure Vessel Code | | **AMS** | 5772 | Sheet, Strip, and Plate (fabricated pipe) | | **EN/DIN** | 2.4684 | European designation | --- #### **8. Fabrication & Installation** **Welding Procedures:** - **Processes**: GTAW preferred, GMAW acceptable - **Filler Metal**: AWS A5.13 ERCoCr-A - **Preheat**: Not required - **Post-Weld Heat Treatment**: Solution anneal at 1230°C recommended **Pipe Fitting & Joining:** - **Butt Welding**: ASME B16.25 preparation - **Flanged Connections**: ASME B16.5 compatible - **Threaded Connections**: NPT threads available **Installation Guidelines:** - **Support Spacing**: Closer than carbon steel due to higher density - **Thermal Expansion**: Allow for greater expansion than stainless steel - **Insulation**: Compatible with standard high-temperature materials --- #### **9. Quality Assurance** **Standard Testing:** - Hydrostatic or pneumatic testing - Eddy current or ultrasonic examination - Dimensional verification per ASTM standards - Chemical and mechanical certification **Special Requirements:** - 100% radiography for critical applications - PMI verification available - Surface contamination testing --- #### **10. Technical Advantages** - **Superior high-temperature strength** compared to stainless steels - **Excellent cyclic oxidation resistance** due to lanthanum addition - **Good thermal fatigue resistance** for temperature cycling service - **Maintains structural integrity** under thermal stress - **Long service life** in aggressive environments --- **Contact Information:** For technical specifications, pressure rating charts, and project consultation for Udimet 188 Pipe applications, please contact our piping engineering specialists.

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 2238 gallon liquid totes Special package is available on request.