Which material is likely to demonstrate greater wear resistance, cast iron or cast steel?

Cast steel is generally recognized for having superior wear resistance compared to cast iron. This can be attributed to several factors related to the material properties of each.

Cast steel has a higher resilience and toughness due to its composition, which allows it to endure stress better and absorb energy when subjected to impacting or abrasive conditions. The microstructure of cast steel, particularly if it is alloyed, can be engineered to develop finer grains, leading to improved hardness and wear resistance.

On the other hand, cast iron, while having certain advantages like excellent machinability and good casting properties, typically contains a higher carbon content, which can result in brittleness. This brittleness can lead to premature wear under conditions involving continuous movement or friction, making cast iron less suitable for applications where high wear resistance is critical.

In many engineering applications, choosing between these materials hinges on balancing factors such as wear resistance, toughness, and the specific loading conditions expected during service. Therefore, cast steel's superior ability to resist wear during operation makes it the more advantageous choice in scenarios where longevity and durability are paramount.