What can be a consequence of defects in metal casting?

Defects in metal casting can significantly compromise the integrity and reliability of the finished product, leading to an increased risk of failure. These defects might include issues such as porosity, shrinkage, misruns, or cold shuts, which can introduce weak points in the material. When subjected to stress or operational conditions, the presence of these defects can result in catastrophic failures, such as cracks or complete structural failure of the component.

In contrast to the correct answer, improvements in hardness, aesthetic quality, or guaranteed durability are not typically associated with defects in casting processes. Defects generally undermine the overall performance and structural integrity, which makes the correct choice focus on the heightened risk of failure rather than any perceived benefits. Therefore, understanding the implications of casting defects is critical for ensuring product reliability and safety.