Inconel Forging Expertise
Inconel forging shapes nickel-chromium superalloys through controlled compressive forces at elevated temperatures, producing components with refined grain structures and superior mechanical properties compared to castings. Forged Inconel parts exhibit higher fatigue strength, better impact resistance, and more uniform directional properties—making forging the preferred manufacturing process for rotating components, pressure-containing parts, and fatigue-critical applications. CastAlloy's forging capabilities cover the full range of Inconel alloys with press capacities from 800 to over 2,000 metric tons.
Forging Process for Inconel
Inconel alloys require precise temperature control during forging due to their narrow forging windows and high flow stress. Inconel 718 is typically forged between 1,700°F and 2,050°F, while Inconel 625 forging temperatures range from 1,700°F to 2,150°F. We use medium-frequency induction heating for uniform temperature distribution, followed by forming on hydraulic presses with controlled strain rates. For alloys with particularly low forgeability, we employ isothermal forging techniques where the dies are maintained at elevated temperatures to prevent workpiece cooling and cracking during deformation.
Applications & Industries
Forged Inconel components serve critical roles in aerospace (turbine discs, compressor blades, engine shafts, fasteners), oil and gas (subsea connectors, wellhead forgings, valve bodies rated for sour service), power generation (gas turbine rotor forgings, steam turbine blading, nuclear reactor components), and chemical processing (high-pressure reactor vessels, heat exchanger tubesheets, pump shafts). The combination of Inconel's corrosion resistance with forging's mechanical property advantages makes these components essential for safety-critical and high-reliability applications.
Technical Specifications
| Specification | Details |
|---|---|
| Alloys | Inconel 718, 625, 600, 601, 690, X-750 |
| Forging Type | Open-die, Closed-die, Isothermal |
| Press Capacity | 800 – 2,000+ metric tons |
| Temperature Range | 1,700°F – 2,150°F (alloy dependent) |
| Post-Processing | Solution annealing, aging, CNC machining |
| Testing | Ultrasonic, X-ray, mechanical testing, CMM |
| Certifications | ISO 9001:2015 |
Frequently Asked Questions
Choose forging when your application requires maximum fatigue strength, impact resistance, or when the component will experience rotating loads or high cyclic stresses. Turbine discs, shafts, and high-pressure valve bodies are typically forged rather than cast.
Inconel 718 is the most widely forged Inconel alloy due to its good forgeability and excellent strength after aging heat treatment. Inconel 625, 600, and X-750 are also commonly forged for various high-temperature and corrosion-resistant applications.