The essential difference between forging and investment casting is that castings need to be melted, poured, and solidified. Forgings, on the other hand, are physically pressed into the desired shape while remaining in a solid state. At first glance, the two processes produce the same results, but this is not the case. These manufacturing processes produce very different properties in the metal, so certain decisions are critical when choosing a process.

Forging, for example, significantly improves structural integrity and provides a high degree of material predictability. Tight tolerances can be achieved with castings, even for complex designs. The size of the designed product is also a factor, as the larger the design, the more difficult it is to forge. Forged products generally require more secondary operations to refine them to the desired specifications.

Grain flow is one of the most significant differences between the two processes. In the casting process, the grain flow is disrupted when the metal is melted. The disadvantage is that the metal loses some of its original strength after solidification. However, in the forging process, the grain flow is maintained and its strength remains unchanged.

The best way to choose between casting and forging is to determine your priorities based on the above factors. If you need superior strength and structural integrity, forging is the best process. Fortunately, we work with professional engineers who are experienced in comparing forging and investment casting to determine the correct process for the best results.