What type of metal is referred to as ferrous metal?

Ferrous metal is defined specifically as any metal that contains iron. This classification is essential within materials science and metallurgy because ferrous metals typically exhibit certain properties, such as magnetic characteristics and susceptibility to corrosion, due to their iron content. Common examples include steel and cast iron. Therefore, identifying ferrous metals is crucial in various industrial applications, especially where strength and durability are required.

The other options do not fit the definition of ferrous metals. For instance, metals formed from copper and aluminum do not contain significant amounts of iron and are categorized as non-ferrous metals. Consequently, they possess different properties and uses compared to ferrous metals.