Haynes 188 is a cobalt-nickel-chromium-tungsten alloy. It has high temperature strength and oxidation resistance at a temperature of about 1095°C (590°F). The following datasheet gives an overview of Haynes 188.
Physical Properties
The following table outlines the physical properties of Haynes 188.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 8.9 g/cm3 | 0.324 lb/in3 |
| Melting point | 1330°C | 2425°F |
Fabrication and Heat Treatment
Machinability
Haynes 188 can be machined using conventional machining methods which are used for iron-based alloys. Machining operations are performed using commercial coolants. High-speed operations such as grinding, milling or turning, are performed using water-based coolants.
Forming
Haynes 188 is formed using all conventional techniques.
Welding
Haynes 188 is welded using TIG, MIG, resistance and electron beam welding methods.
Heat Treatment
Haynes 188 is heat treated at 1175°C (2150°F) followed by cooling.
Forging
Haynes 188 is forged by soaking at 1175°C (2150°F). It is then rapidly cooled.
Cold Working
Haynes 188 is cold worked using common methods.
Applications
Haynes 188 finds application in the following areas:
- Aerospace industry
- Hot sections of engines in burner cans
- Commercial industrial applications
- Afterburner components