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Centrifugal Casting Process

centrifugal-capabilities

What Is Centrifugal Casting?

Centrifugal casting is a viable alternative to hot extruded tubing, forged tubing, rolled and welded tubing. Here’s how the centrifugal casting process works.

Cross-section of a horizontal die with a line designating its axis of rotation

Figure 1: Cross-section of a horizontal die with a line designating its axis of rotation

  1. Starting with a rotating die, liquid metal is introduced into the die.
  2. Because the die is rotating, the g-forces drive the liquid metal against the die walls, which simultaneously begin to freeze the castings from the outside in.
  3. Shrinkage voids are filled under high pressure from centrifugal force. Slag, dirt and dross, being of lower densities than the metals, spin to the core or center.
  4. The tubes are machined to remove these nonmetallic impurities that have spun to the center.
Figure 2: Amplified internal pressures promote enhanced feeding and porosity reduction by approximately 89 percent

Figure 2: Amplified internal pressures promote enhanced feeding and porosity reduction by approximately 89 percent

Advantages of the Centrifugal Casting Process

The end result of centrifugal casting is a metal part that’s:

  • Clean
  • Dense
  • Uniform

Forging vs. Casting

Centrifugally cast metal can be a cost-effective, simple route to near net-shaped manufactured goods. In the right hands, today’s advanced centrifugal casting techniques provide clean, dense end products that meet a wide array of high performance characteristics and volume needs at likely lower costs than forging.

Duplex Stainless Steel

Learn more about specifying robust alloys for centrifugal castings. More