Wear is probably the most common cause of material replacement in industry. Bushings and bearings are common examples of components which must provide metal-to-metal wear resistance. Wear is a universal constant in moving equipment in all applications.
In some applications like food processing the use of certain materials that provide superior wear resistance (copper-based alloys, for example) is restricted or prohibited. In these applications, specific alloys have been developed to eliminate certain types of wear, like galling, without reacting with the environment. In the case of food processing applications, for example, a series of “dairy metals” has been developed to prevent these types of wear. When corrosion-resistance is the primary concern, high-performance cobalt-based alloys are often specified.