STEP 1
Superior high-temperature resistance
It can operate long-term at 850°C and above, featuring outstanding tensile strength, fatigue strength and creep resistance, with low risk of deformation or fracture.
IN939 Alloy
IN939 is a high-performance nickel-based superalloy. It retains high strength at temperatures above 850°C, paired with excellent corrosion and oxidation resistance. It is widely used for core components of aero-engines and gas turbines.
IN939 Alloy Introduction
IN939 is a high-performance nickel-based superalloy. It retains high strength at temperatures above 850°C, paired with excellent corrosion and oxidation resistance. It is widely used for core components of aero-engines and gas turbines.
IN-939 is a corrosion-resistant nickel-based superalloy. Components made from this material are conventionally produced via precision casting and primarily deployed for blades and vanes in industrial gas turbines. As significant segregation occurs post-casting, the alloy cannot be used in its as-cast state under standard production processes. Accordingly, it must undergo solution heat treatment, followed by aging treatment, to attain optimal strength and ductility.
The nominal material composition for precision castings.
| C | Cr | Co | Mo | W | Ta | Nb | Al | Ti | Zr | B | N | O | P | S | Ni |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.15 | 22.4 | 19.0 | ＜0.01 | 2.0 | 1.45 | 1.0 | 2.0 | 3.7 | ＜0.003 | 0.004 | ＜0.005 | ＜0.002 | ＜0.005 | ＜0.001 | Bal. |
IN939 Alloy Properties
In939 Alloy Applications
- Aero-engines: Manufactures high-temperature parts such as turbine blades and nozzles, serving as a critical material for core engine components.
- Industrial gas turbines: Used for components bearing extreme high-temperature loads in power generation, including first-stage nozzles.
- Chemical & aerospace industries: Applied to corrosion-resistant high-temperature chemical equipment and aerospace structural parts.
Manufacturing & Processing Notes
3D Printing:
- Processable via laser powder bed fusion (LPBF). However, its narrow processing window makes it prone to cracking, requiring precise control of process parameters.
Heat Treatment
- Post-printing or post-fabrication parts generally undergo solution treatment and aging treatment to optimize microstructure, hardness and strength. Hot isostatic pressing (HIP) is unnecessary for certain processes.
Critical Chemical Composition
- The alloy is mainly composed of nickel, chromium (~23%), cobalt (~19%), titanium and aluminum. The high chromium content is the core reason for its superior corrosion resistance.
