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1. Cast carbon steel. Cast steel with carbon as the main alloying element and small amounts of other elements. Cast carbon steel can be divided into cast low carbon steel, cast medium carbon steel and cast high carbon steel. The carbon content of cast low carbon steel is less than 0.25%, the carbon content of cast medium carbon steel is between 0.25% and 0.60%, and the carbon content of cast high carbon steel is between 0.6% and 3.0%. The strength and hardness of cast carbon steel increase with the increase of carbon content.
Cast carbon steel has several advantages: lower production cost, higher strength, better toughness and stronger plasticity.
Cast carbon steel can be used in the manufacture of parts subject to heavy loads, such as rolling mill frames in heavy machinery, hydraulic press bases, etc. It can also be used to manufacture parts subject to high forces and shocks, such as wheels, couplers, bolsters and side frames on railway vehicles.
2. Cast alloy steel. Cast alloy steel can be divided into cast low alloy steel (the total amount of alloy elements is less than or equal to 5%), cast medium alloy steel (the total amount of alloy elements is 5%~10%) and cast high alloy steel (the total amount of alloy elements is greater than or equal to 10%).