The critical difference between steel and cast iron is that steel is pliable and supple, while cast iron is solid and has high compressive strength. In steel, the primary alloying element is carbon, and the other elements are manganese, up to 0.6 percent silicon, and copper. The steel is made of 2 percent carbon, up to 1.65 percent manganese, and up to 0.6 percent silicon and 0.6 copper by weight. Steel can fall into four different groups. These include low carbon steel, medium carbon steel, high carbon steel, and tool steel.
On the other hand, cast iron is an alloy of iron that contains 2 to 4 percent carbon by weight. In this alloy, a higher silicon concentration and a greater concentration of layers are present. You can cast iron easily into various shapes on account of higher volatility, and the occurrence of carbon is in the form of graphite or iron carbide or both.
Alloy falls under different groups, including white cast iron, grey cast iron, malleable cast iron, nodular cast iron, and high alloy cast iron. Cast iron is cheaper than most steels. Also, the melting temperature of steel is more elevated than cast iron.