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Open Die Forging | The Differences Between Open and Closed Die Forging

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When it comes to forging, there are primarily two types that come to mind. Open die forging and closed die forging are two great ways to produce the products you need for your next project.

Open-Die Forgings

Open-die forgings also are known as free forging, given that the die is not closed like in closed die forging. In this type of forging, the billet is placed between multiple dies that do not entirely cover the metal entirely. The dimensions will be changed by hammering and stamping the metal through a series of movements until the desired dimensions are reached. The biggest benefits of this kind of forging are:

  • Better fatigue resistance
  • Continuous grain flow and finer grain size
  • Increased strength and longer part life
  • Less material waste
  • Reduced chance of voices
  • Valuable cost savings

In open die forging, huge compressive forces are applied by the continuous striking of the forger’s hammer to deform the metal. Unlike closed die forging, the dies of open die forgings are very simple but always require secondary machining.

Closed-Die Forgings

Closed-die forging, otherwise known as impression die forging, is a metal forming process that compresses a piece of metal under high pressure to fill a closed die impression. Some of the biggest benefits of using closed die forging are:

  • The process is economical for large production runs
  • No material limitation
  • Better surface finish
  • Little to no machinating required afterward
  • More intricate designs can be achieved
  • And more

You can use pretty much any material and get a component that is heat resistant and filled with other tolerances that make them extremely useful.

What is open die forging?

Where Can I Get Information About Open Die Forging?

Have you been looking for more information about what goes into an open die forging? If so, contact us today. Ferralloy Inc is here to help you find exactly what you need ahead of your next project.