Steel castings are especially adapted for parts that must withstand wear, shocks or heavy loads. They are stronger than wrought iron, cast iron or malleable iron, and they are very tough. There are two general types of steel castings, carbon and alloy, which are described in greater detail below.
Steel castings can be heat treated to bring about the diffusion of carbon or alloying elements, softening, hardening, stress relieving, and toughening. In addition, heat treating improves machinability, increases wear resistance, and removes hydrogen entrapped at the surface of the casting.
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