Hastelloy Materials
Hastelloy is a trademarked name for a group of corrosion-resistant metal alloys primarily made of nickel, with significant amounts of molybdenum, iron, cobalt, and other elements. It is widely used in chemical processing, aerospace, marine, and other industries where extreme corrosion resistance is required.
Common Hastelloy Grades
| Grade |
Typical Composition |
Applications |
| Hastelloy C-22 |
Ni: 57%, Mo: 13%, Fe: 6%, Cr: 22%, W: 3%, Co: balance |
Chemical processing, aerospace, marine environments |
| Hastelloy C-276 |
Ni: 57%, Mo: 16%, Fe: 6%, Cr: 16%, W: 3%, Co: balance |
Highly oxidizing and reducing environments, chemical equipment |
| Hastelloy B-2 |
Ni: 63%, Mo: 28%, Fe: balance |
Hydrochloric acid handling, chemical tanks, heat exchangers |
Key Features of Hastelloy
- Exceptional resistance to pitting, stress-corrosion cracking, and oxidizing/reducing agents.
- High strength at elevated temperatures.
- Outstanding performance in aggressive chemical environments.
- Excellent weldability and formability.
Applications
Hastelloy alloys are used extensively in chemical processing, pollution control, aerospace, marine engineering, heat exchangers, and marine environments. They are also ideal for equipment exposed to strong oxidizing agents such as chlorine, ferric chloride, and hydrochloric acid.
Typical Composition Table
| Element |
C-22 (%) |
C-276 (%) |
B-2 (%) |
| Nickel (Ni) |
57 |
57 |
63 |
| Molybdenum (Mo) |
13 |
16 |
28 |
| Chromium (Cr) |
22 |
16 |
— |
| Iron (Fe) |
6 |
6 |
balance |
| Tungsten (W) |
3 |
3 |
— |
| Cobalt (Co) |
balance |
balance |
— |
