Cast Steel Ball

Low production cost: The casting process is relatively simple, with less investment in equipment. It is flexible for the production arrangement of small batches and multiple specifications of orders, which can effectively control costs.
Capable of producing steel balls with complex shapes: It can produce steel balls with complex shapes such as special-shaped ones, meeting the needs of special application scenarios.
High hardness: Depending on different alloy compositions and heat treatment processes, cast steel balls can obtain high hardness. Generally, the hardness of low-chromium alloy cast balls is HRC≥45, and that of high-chromium alloy cast balls is HRC≥58, so they have good wear resistance.
Wide range of applications: It is widely used in dry grinding fields such as cement plants, chemical plants, power plants, and quartz sand plants, especially performing well in the dry grinding field represented by cement.
Adjustable performance: By adjusting the proportion of alloy elements and the production process, cast steel balls with different mechanical properties can be produced according to customer requirements.

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Product Details

Cast iron balls can be divided into three categories, including high chromium balls, medium chromium balls, and low chromium balls.

Quality Indicators of High Chromium Balls
The chromium content of high chromium balls is greater than or equal to 10.0%, and the carbon content is between 1.80% and 3.20%. According to the national standard, the hardness of high chromium balls must be no less than 58HRC, and the impact value should be greater than or equal to 3 J/cm². To achieve this hardness, high chromium balls must undergo high-temperature quenching and tempering treatment. Currently, there are two quenching methods for high chromium balls in China, namely oil quenching and air quenching. If the tested hardness of a high chromium ball is lower than 54HRC, it means that it has not been quenched.
Quality Indicators of Medium Chromium Balls
For medium chromium balls, the specified chromium content ranges from 3.0% to 7.0%, and the carbon content is between 1.80% and 3.20%. Its impact value should be no less than 2.0 J/cm². According to the national standard requirements, the hardness of medium chromium balls should be greater than or equal to 47HRC. To ensure the quality, medium chromium balls should be treated with high-temperature tempering to eliminate the casting stress.
If the surface of the iron ball is blackish red, it proves that the iron ball has undergone high-temperature tempering treatment. If the surface of the iron ball still retains its metallic luster, we can judge that the iron ball has not been subjected to high-temperature tempering treatment.
Quality Indicators of Low Chromium Balls
Generally speaking, the chromium content of low chromium balls is 0.5% to 2.5%, and the carbon content ranges from 1.80% to 3.20%. Therefore, according to the national standard, the hardness of low chromium balls should be no less than 45HRC, and the impact value should be no less than 1.5 J/cm². Low chromium balls also require high-temperature tempering treatment to ensure quality. This treatment can eliminate the casting stress. If the surface of the iron ball is dark red, it indicates that it has undergone high-temperature tempering treatment. If the surface still shows its metallic luster, it indicates that the iron ball has not been subjected to high-temperature tempering.
Cast iron balls are usually used in various cement plants, chemical plants, power plants, quartz sand plants, silica sand plants, etc. for large-scale mining.