How does cast iron’s resistance to deformation compare to aluminum under weight?

Cast iron and aluminum are two widely used metals with distinct properties, particularly when it comes to resistance to deformation under weight. Cast iron, known for its high compressive strength and rigidity, generally outperforms aluminum in resisting deformation. Its dense, crystalline structure allows it to bear heavy loads without bending or warping easily.

Aluminum, on the other hand, is lighter and more malleable, making it more prone to deformation under significant weight. While aluminum alloys can be engineered for higher strength, they still typically fall short of cast iron's inherent resistance to bending or cracking under pressure.

For applications requiring minimal deformation—such as engine blocks, heavy machinery, or structural components—cast iron is often preferred. Aluminum, however, excels where weight savings are critical, like in aerospace or automotive lightweight designs. Understanding these differences helps in selecting the right material for specific load-bearing needs.