1. Iron (Fe): The most common and defining ferrous metal.

2. Steel: An alloy primarily composed of iron, but often containing carbon and other elements to enhance its properties.

3. Cast Iron: A type of iron with a high carbon content, making it brittle but strong in compression.

4. Nickel Steel: An alloy of iron and nickel, known for its strength and resistance to corrosion.

5. Stainless Steel: A type of steel containing at least 10.5% chromium, which creates a protective oxide layer and makes it highly resistant to corrosion.