aluminum to be forged. Billet to forging options at Cerro. Closed die forging.

Closed Die Forging

As an aluminum forging company, we are experts in closed die forging.

Casting, forging, billet, and extrusions all are different methods of manufacturing parts. Each method has its own benefits. Here, we take a look at what those benefits are and make a comparison.

What is a Closed Die Forging?

A closed die forging, sometimes called an impression die forging or near net shape forging, involves a malleable billet of metal being placed between two die halves. The bottom die half is stationary. The top die comes down to compress the malleable billet. When this happens, the billet is dispersed, and the metal moves to fill in both die half cavities, intricately mirroring the design encoded within the dies.

This process works with the billet’s internal grain structure to produce stronger and longer-lasting parts than if that same part machined from billet material or from a casting. Moreover, this forging process minimizes the need for extensive post-forging machining, thereby reducing material waste and production costs while maximizing efficiency.

Forging Video

See below for a short demonstration video of the closed die forging process.


  • Better surface finish and superior mechanical properties
  • Less machining due to a closer net shape to the final geometry of the part
  • Cost effective for larger production runs
  • Achieve dimensions with tighter tolerances
  • Achieve more precise and consistent impressions

Compared to alternatives such as machining parts from billet material or casting, closed die forging delivers components of exceptional quality and performance across a myriad of industries and applications.

At Cerro Fabricated Products, we custom manufacture premium-quality aluminum and other non-ferrous components for a wide variety of industries. Contact us for an expert consultation and a free quote for all of your precision forged and machined component needs.