Question

Some material properties are good for processing the material, but not ideal for the final product in service. Please provide and explain a good example. Sometimes the opposite is true: Please explain with a second, different example.

Answer 1

The mechanical properties such as low strength are good for processing. Due to the low strength, the machining and/or forming forces required are of lower magnitude and hence lower power consumption in the process, which is good for processing. But such material can not be used in service where strength requirements are higher.

On the contrary, materials with high surface hardness demand higher machining forces and hence higher power consumption. But such materials perform well in the service where higher wear resistance is required.