Different Types of Carbon Steel Casting Methods

What is carbon steel casting?

When carbon steel is put for casting, the finished product of that process is called as carbon steel casting. Technically speaking, carbon steels are those steels that contain only residual amounts of substances other than carbon, silicon, aluminum along with manganese and cerium.
There are two types of carbon steels namely low carbon steels and medium carbon steels. While low carbon steels contain only 0.15% carbon, medium carbon steels contain about 0.25-0.55% carbon content. Therefore, low carbon steels are mainly used for applications that require metals with high ductility. On the other hand, medium carbon steels are often heat-treated to gain yet higher strengths.

Components

The following are the components of carbon steel casting. Carbon maximum 0.04, manganese maximum 1.0, silicon maximum 1.0, phosphorus maximum 0.04, sulphur maximum 0.04, chromium maximum 24.5-26.5, Nickel maximum 4.75-6.0, Molybdenum maximum 1.17-2.25, copper maximum 2.75-3.25. These are the main components of carbon steel casting.

Manufacturing methods

Carbon steel casting can be manufactured by Sand casting, Investment casting, Permanent mold casting, Lost foam casting, etc. Here, I will attempt to explain a couple of these methods in brief.

Sand casting is one of the most popular, simplest and cheapest type of casting. This method has been used for centuries together with good results. This method allows manufacturers to cast the material in smaller batches and that too at a very reasonable cost.

Therefore, merchants with very small size of operations can use this method successfully. Not only is it cost effective, but it is also suitable for people who have small operations. Also, sand casting is a method that allows most of the metals to be cast depending upon the type of sand used for the molds.

Investment casting derives its name from the fact that the casting pattern is invested or surrounded by refractory materials. This method has been practiced since thousands of years. This process is also called as the lost wax process and it is one of the most ancient metal forming techniques.

This method ensures that high quality components are produced accurately, repeatedly and with integrity. Although, this process is mainly suitable for small castings, this method has produced aircraft door frames with steel castings up to 300 kilograms and aluminum castings up to 30 kilograms. Thus, this method is also for small scale operations.

Conclusion

Casting is a process that involves pouring of the liquid metal into a mold, which has a hollow cavity of the desired shape. After this liquid metal solidifies or cools, the solidified part is called as a casting.

This casting is forcibly removed from the mold in order to complete the whole casting process. Casting is an economical method to produce shapes which cannot be produced by other methods. Modern casting methods are divided into expendable casting and non-expendable casting process.

These methods are further classified based on the mold material used and the pouring method. The casting process used in the above method can give you good quality carbon steel casting.

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