Alloy 188,Udimet 188 Forgings,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 Forgings / UNS R30188** **Cobalt-Chromium-Nickel-Tungsten Superalloy Forgings** --- ### **1. Product Overview** Alloy 188 Forgings (commercially known as Udimet 188 Forgings or Haynes 188 Forgings, UNS R30188) are manufactured through controlled thermomechanical processes that optimize the microstructure and mechanical properties of this cobalt-based superalloy. The forging process enhances grain structure, eliminates porosity, and improves directional strength, resulting in components with superior performance at temperatures up to **1100°C (2012°F)**. --- ### **2. Chemical Composition (Weight %)** | Element | Content (%) | Key Role | |---------|-------------|----------| | Cobalt (Co) | Balance | High-temperature matrix | | 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 | |----------|-------| | Density | 9.13 g/cm³ | | Melting Range | 1330–1380°C | | Thermal Conductivity | 10.1 W/m·K at 100°C | | Coefficient of Thermal Expansion | 12.3 μm/m·°C (20–100°C) | | Electrical Resistivity | 1.02 μΩ·m | | Magnetic Permeability | Essentially non-magnetic | --- ### **4. Mechanical Properties** **Room Temperature Properties (Solution Annealed):** - Tensile Strength: 965 MPa min (140 ksi min) - Yield Strength (0.2% Offset): 485 MPa min (70 ksi min) - Elongation: 50% min - Reduction of Area: 60% 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 Service Temperature: 1150°C (intermittent) --- ### **5. Forging Process & Capabilities** **Forging Methods:** - Open-die forgings - Closed-die forgings - Ring rolling - Press forgings **Size Range:** - Weight: 1 kg to 2000 kg - Maximum dimensions: 3000 mm length - Ring sizes: 200 mm to 3000 mm OD **Heat Treatment:** - Solution Annealing: 1230°C ± 15°C - Quenching: Rapid air or water cool - Stress Relieving: 870–900°C as required --- ### **6. Applications** **Aerospace & Defense:** - Turbine shafts and disks - Engine mounting components - Afterburner parts - Rocket motor components **Power Generation:** - Gas turbine wheels - Turbine blades and vanes - Combustion chamber components - Nuclear reactor core components **Industrial Equipment:** - High-temperature valves - Pump shafts and components - Heat treatment fixtures - Chemical processing equipment --- ### **7. International Standards** | Standard Type | Standard Number | Application | |---------------|-----------------|-------------| | UNS | R30188 | Material designation | | ASTM | B564 | Nickel Alloy Forgings | | AMS | 5803 | Bar, Forgings, and Rings | | ASME | SB-564 | Pressure vessel applications | | EN/DIN | 2.4684 | European designation | | ISO | 9723 | Aerospace forgings | --- ### **8. Quality Assurance** **Testing & Inspection:** - Ultrasonic testing per ASTM A388 - Liquid penetrant inspection - Radiographic examination - Macro-etch testing - Grain flow verification **Certification:** - Mill test certificates EN 10204 3.1/3.2 - Chemical and mechanical property reports - Heat treatment documentation - Non-destructive testing reports --- ### **9. Design Advantages** - Superior grain structure and directional properties - Enhanced fatigue resistance - Improved stress rupture strength - Better impact toughness - Reduced material anisotropy - Elimination of casting defects --- ### **10. Machining & Fabrication** **Machining Guidelines:** - Use carbide tools with positive rake angles - Recommended cutting speeds: 10–20 m/min - Adequate coolant flow required - Interrupted cuts should be avoided **Post-Forging Processing:** - Solution annealing after rough machining - Stress relief after heavy machining - Final machining to required dimensions - Surface treatment as specified --- **Note:** All forgings are supplied with complete traceability and certification. Custom forging designs and heat treatment cycles are available to meet specific application requirements. Consult with our technical team for design optimization and manufacturing 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 2244 gallon liquid totes Special package is available on request.