How does the weight of aluminum compare to cast iron?

Aluminum and cast iron are two widely used materials in manufacturing and construction, each with distinct properties. One of the most notable differences between them is their weight. Aluminum is significantly lighter than cast iron, with a density of approximately 2.7 g/cm³, compared to cast iron's density of around 7.2 g/cm³. This makes aluminum about 2.7 times lighter than cast iron.

The lightweight nature of aluminum makes it an ideal choice for applications where reducing weight is crucial, such as in the automotive and aerospace industries. On the other hand, cast iron's heavier weight contributes to its strength and durability, making it suitable for heavy-duty applications like machinery bases and engine blocks.

In summary, while aluminum offers the advantage of being lightweight and easier to handle, cast iron provides unmatched strength and stability due to its higher density. The choice between the two depends on the specific requirements of the application, balancing weight, strength, and functionality.