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Open Die Forging | How Open Die and Closed Die Forging Differs

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Forging is used in a variety of industries for things like construction machines, agricultural machinery, automotive, and oilfield equipment. When it comes to forgings, there are two main types. Those are open die and closed die forging. Let’s take a look at how open die forging and closed die forging differ.


Open die forging is also referred to as free forging. During the open die process, metal billets are compressed under external compressive force and deformed to the desired dimensions or shapes without forging dies. Closed die forging is also known as impression die forging. During the closed die process, the material is heated by a medium frequency induction heating furnace to high temperatures. It is then forged between upper and lower dies to get the expected shapes.


For closed die forging, the molding dies are first precision machined. The metal bars are then placed on between upper and lower dies and forged to any shapes needed. As a result, closed die forging is a net shape or near net shape process. With open die forgings, enormous compressive forces are imposed by the continuous strike of a forging hammer to deform the metal billets. Unlike closed die forging, the open die process is significantly more simple.

Are You Looking for Open Die Forging?

At Ferralloy, we have the forgings you need for your next project. Whether it’s open die or closed die, we have the parts you need. Contact us today to learn more or to place an order.


What is open die forging?