What Is Cast Steel?

Cast steel refers to steel that is used exclusively to make steel castings. When the strength of the casting is high and cast iron cannot meet the requirements, cast steel should be used. However, the molten steel of cast steel is not as fluid as cast iron, so the thickness of the pouring structure should not be too small, and the shape should not be too complicated. When the silicon content is controlled at the upper limit, the fluidity of molten steel can be improved. Cast steel can be divided into general engineering cast steel, welded structural cast steel, stainless steel cast steel, heat-resistant steel cast steel according to the variety and use. ^[1]

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Cast steel is a type of casting alloy, with iron and carbon as the main elements, and the carbon content is between 0-2%.

304, 316 cast steel is currently the most widely used stainless steel, both of which are

Advantages of steel castings

1. Greater design flexibility

This design has the greatest degree of freedom in choosing the shape and size of the casting, especially for complex shapes and hollow parts, and the steel casting can be manufactured by a unique process of the core casting. Easy to shape and change shape and can quickly make finished products from drawings can provide fast response and shorten delivery time.

2. The strongest flexibility and variability in metallurgical manufacturing

You can choose different chemical compositions and organizational structures to meet the needs of different projects. Different heat treatment processes can choose mechanical properties and can use this property in a wide range and improve solderability and workability.

3. Improve overall structural strength

Due to the high reliability of the project, coupled with weight reduction design and short delivery time, it can increase its competitive advantage in terms of price and economy.

4. Wide range of weight changes

Small steel castings may only be 10 grams, while large steel castings can reach several tons, dozens or even hundreds of tons.

Compared to forged steel parts

The mechanical properties of steel castings are not much different in all directions, and they are superior to forged steel parts. Designers must consider the properties of materials in three directions when designing some high-tech products, which highlights the advantages of castings. Regardless of weight, volume, and volume made at one time, steel castings can easily make complex shapes and non-stress concentrated parts.

Compared to welded structure

In terms of shape and size, the welding structure is more flexible than forged steel parts, but compared with steel castings, it still has the following disadvantages:

1). Easy to deform during welding.

2) It is difficult to form a streamlined structure.

3). High internal stress during welding.

4). Welds affect the appearance and reliability of the part.

Compared to iron castings and other alloy castings

Steel castings can be used in a variety of working conditions and have better mechanical properties than other alloy castings.

When we need high tensile strength or dynamic load components, important pressure vessel castings and core components that bear heavy loads at low or high temperatures, in principle, we should prefer steel castings.

However, steel castings are less absorbing, abrasion-resistant, and mobile than iron castings, and they are more expensive than iron castings.