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What is the difference between "casting" and "forging" and what are the advantages and disadvantages of both?

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  • Kitty
  • Apr 28,2022
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What is the difference between "casting" and "forging" and what are the advantages and disadvantages of both?

Casting and forging are two different types of metal production and manufacturing methods. These two processes have been in place for thousands of years, but what are the differences between these two types of metal production and processing?

What does casting mean?

Casting is the process of pouring molten metal into a mold or die and cooling and hardening it so that it vacuum casting has the appearance of a mold. This process is very suitable for mass production of parts, while using the same mold many times over to produce the same goods.


There are several different types of castings. Aluminum die casting is when the liquid metal is forced into the mold and the added burden keeps it in place until it hardens. This process is known for its applicable and rapid application. Permanent die casting involves the application of a force or vacuum pump to pour molten metal into the metal mold to fill it. Permanent die casting can result in stronger castings than aluminum die casting, but they are difficult to remove from the final equipment. Thus, semi-permanent die castings can also be given. These molds have expendable cores, making them easier to manage and less costly to remove.

The final casting process is sand casting. Under sand casting, the casting is produced according to a pattern design suppressed into a fine sand mixture. This produces the mold in which the molten metal is poured. This process is slower, but usually more economically developed than other types of casting. It can also be applied when elaborate formulations or medium to large metal production and manufacturing are necessary.

What does forging mean?

Forging applies a compressive force to create metal. A hammer or die strikes the metal product workpiece until it produces the desired look. The effect of forging deforms and shapes the metal, resulting in uninterrupted granular fluidity, which in turn allows the metal to maintain its compressive strength. This distinctive granular fluidity assists in the removal of defects, inclusions and porosity from the product. Another feature of forging is the relatively low cost that can be maintained in long-term manufacturing. Once the forging tool is manufactured, the product can be produced at a relatively high rate with minimal shutdown time.


If the metal is to be forged at room temperature, it is called cold forging. Forging can also be carried out with metal heated above room temperature to below plastic deformation temperature, subsequently called warm forging. When the metal is heated to its plastic deformation temperature (its transformation with the metal), the process is called hot forging. Forging is one of the oldest types of production and was applied in blacksmith stores many centuries ago.

What is the difference between casting and forging?

Forging results in metal goods that usually have more compressive strength and are usually tougher than the metal produced and processed in castings. Metal castings are less likely to shatter when touched by other objects. The increased compressive strength is the result of the forging process in which the metal is forced into a new style based on inhibition or pounding. In contrast to other manufacturing methods, the crystals of the metal are drawn here in the process, aligning the two ends in one orientation rather than any two ends. At the end of the forging process, the resulting metal is stronger than when it was cast.

The forging process is drawn out

However, forging has a size limit. Forging makes it more difficult to form metal because, unlike casting, the process keeps the metal solid. Because forging is more difficult to change the appearance of the metal, the size and thickness of forged metal is limited. The larger the portion of metal already produced and processed, the more difficult forging becomes.

Under casting, molten metal is injected into a mold or cavity in a mold, which can be more easily produced to create a more elaborate look. Virtually all raw materials can be cast, and goods up to 200 tons can be produced and manufactured. Casting is usually much more cost effective than forging. Casting and forging both have their advantages and disadvantages, so which of these two methods is best? The key lies in what is produced and manufactured.

Related Hot Topic

Why use vacuum casting, exactly?

When air entrapment in the mold is a concern, vacuum casting is used. The procedure can also be used when the mold has complicated details and undercuts. Additionally, it is applicable if the mold was made from reinforced wire or fiber.

Vacuum formation is it rapid?

With the heating and vacuuming phases often requiring only a few minutes, vacuum forming is a rather rapid procedure. However, the time needed for chilling, trimming, and making molds can vary greatly depending on the size and complexity of the pieces being made.

What is investment casting in a vacuum?

In vacuum investment casting, the mold is created in the same manner, but before the cavity is filled with metal, air is forced out of it. Because it's important to keep the liquid metal from oxidizing, melting and pouring are both carried out in a vacuum.