Which of the following discontinuities might be found in rolled plate stock?

Inclusions are an important consideration when evaluating rolled plate stock because they refer to impurities or foreign materials that are unintentionally introduced into the metal during its production process. These can be microscopic or macroscopic and may originate from various sources, like contamination from the raw materials, during melting, or from the manufacturing machinery itself. Inclusions can adversely affect the mechanical properties of the metal, leading to weaknesses such as reduced ductility, affected weldability, and variable strength characteristics, which makes understanding and identifying them essential in quality control.

In the context of rolled plate stock, inclusions can significantly impact the performance and reliability of the final product, particularly in critical applications where structural integrity is paramount. The presence of inclusions can often indicate poor processing or the need for more stringent quality control measures, which is why they are a key focus in the inspection and selection of rolled metal products.