According to the quantity of carbon content, carbon steel ball is divided into low carbon steel ball (0.04% ~ 0.25%), medium carbon steel ball (0.25 ~ 0.6%) and high carbon steel ball (0.6% ~ 1.35%). In domestic, low carbon steel balls are used mostly, and medium carbon steel ball and high carbon steel ball is rarely produced and processed. Since domestic demand is not large, the quality demand is not high and it focuses on pricing. Thus, the low carbon steel balls satisfy the fundamental needs of customers, which is cheap and there is definite hardness. Market demand determines the quality of the carbon steel balls. With the requirements of product quality are getting higher and higher, it will also change the market demand. High-quality, high-precision carbon steel balls must be the general trend.