How many classes are metals divided into?

Metals are typically categorized into two main classes: ferrous and non-ferrous. Ferrous metals contain iron, and they are known for their magnetic properties and high tensile strength. Common examples include steel and cast iron. Non-ferrous metals, on the other hand, do not contain significant amounts of iron, which gives them different characteristics such as resistance to corrosion and generally lower density. Examples of non-ferrous metals include aluminum, copper, lead, and zinc.

Understanding this classification is fundamental, especially in aviation and engineering fields, as the choice of metal impacts design, performance, and safety in various applications. Therefore, recognizing that there are two primary classes of metals is crucial for anyone in the field.