It should temperature

It should be hard faced

It should be heat treated

It should be peened

To increase the labour cost

To increase idle time of plant

To decrease mechanical efficiency

To increase mechanical operating efficiency

Cast iron

Mild steel

Aluminium

Chromium and tungsten carbide

Drilling

Peening

Pre heating

Post heating

To decrease the mechanical property

To increase labour cost

To increase idle time

To increase mechanical operating efficiency