ni hard
/ˈnaɪˌhɑrd/
noun
- A very hard type of cast iron that contains nickel, used for making parts that need to resist wear.
- Ni-hard is often used for making pump parts that handle sand and gravel.
- The mining company replaced the worn liners with ni-hard for longer life.
- Engineers chose ni-hard for the crusher rolls because of its extreme hardness.