How does the weight of cast iron compare to aluminum?

The weight of cast iron and aluminum differs significantly due to their distinct densities. Cast iron has a density of approximately 7.2 g/cm³, making it much heavier than aluminum, which has a density of about 2.7 g/cm³. This means that cast iron is nearly 2.7 times denser than aluminum. For example, a cubic foot of cast iron weighs around 450 pounds, while the same volume of aluminum weighs only about 168 pounds.

This weight difference has practical implications in various industries. Cast iron's heaviness makes it ideal for applications requiring durability and stability, such as engine blocks and machinery bases. On the other hand, aluminum's lighter weight is advantageous in industries like aerospace and automotive, where reducing overall weight is crucial for efficiency and performance.

In summary, while cast iron is significantly heavier than aluminum, each material's unique properties make them suitable for specific applications. Understanding their weight differences helps in making informed decisions when selecting materials for engineering and manufacturing projects.