* Iron (Fe) - The most common and defining element of ferrous metals.

* Steel - An alloy of iron with carbon, often with other elements like manganese, chromium, nickel, and others.

* Cast Iron - An iron alloy with a high carbon content (typically above 2%).

* Wrought Iron - An iron alloy with a very low carbon content (typically less than 0.08%).

* Stainless Steel - An iron alloy with at least 10.5% chromium, making it corrosion-resistant.

These are just a few examples. There are many other alloys and variations within the ferrous metal category.