Why does cylinder heads made of cast iron?

Cylinder heads are often made of cast iron due to its Excellent castability, strength, and durability. Cast iron can withstand high temperatures and pressures, making it suitable for the harsh conditions within an engine. Additionally, its good wear resistance and ability to absorb vibrations contribute to the overall performance and longevity of the engine. While aluminum is also used for weight savings, cast iron remains a popular choice for many applications.