The difference between cast iron and alloy steel.

The main differences between cast iron and alloy steel lie in their chemical composition, physical properties, applications, and processing characteristics.

Chemical composition: Cast iron is mainly composed of iron, carbon, and silicon, with a carbon content exceeding the amount that can be retained in the austenite solid solution at the eutectic temperature. The carbon content is usually between 2-4%. Alloy steel is the addition of one or several alloying elements to carbon steel to improve certain aspects of performance, such as strength, corrosion resistance, etc.

Physical properties: The characteristics of cast iron are brittleness, inability to forge, low melting point, and good casting performance, which can be shaped into any form or shape. Alloy steel has comprehensive mechanical properties that combine high strength and plasticity, as well as toughness. Some also have special physical and chemical properties, such as corrosion resistance, heat resistance, wear resistance, and magnetism.