Difference Between Cast Steel Valves and Forged Steel Valves

Valves are an integral part of any industrial unit or system. Industrial valves are used to regulate the flow of media through a pipeline, isolate certain areas of a pipeline, check the system integrity of a unit, etc. This is why industrial valves need to be of the highest quality, leak-proof, efficient and durable.

 

Casting

Casting is a method of producing various object by pouring liquid (molted) metal (steel), or another liquid or suspension capable of solidifying, into the mold of the required shape. The casting method is chosen primarily for products of complicated shapes, which cannot be produced by a different method or are made in complicated or expensive way (e.g., by machining or welding). After pouring the steel into the mold, the liquid steel is in immediate contact with a cold wall, which cause decreasing the temperature of the steel and its crystallization. The casting temperature, for example of carbon steel, is around 1 450 °C.

 

Cast steels have a chemical composition like forge steels but compared to forge steels they have worse mechanical properties which can be improved by their heat treatment. For cast steels the beneficial effect of forging (compaction of the material) is not possible. The advantage is the possibility of casting complicated shapes, which cannot be produced by forging and the material savings due to this.

 

Valve Body

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