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.
| 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 |
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.
| 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 | — |