Carbon steel ball is one of the earliest types steel balls used in our life and factory. Compared with other steel balls, carbon steel balls are characterized by Wide range and large dosage. Carbon steel balls are classified into low carbon steel balls (0.04%~0.25%), medium carbon steel balls (0.25%~0.6%), and high carbon steel balls (0.6%~1.35%). According to the content of carbon, the performance of the carbon sphere changed. As the carbon content increases, the strength and hardness of the steel will increase, but their toughness and weldability will decrease. Normally, low carbon steel balls and medium carbon steel balls mainly used in the manufacture parts and machines parts, high carbon steel balls are used in the tools. Our carbon steel ball is processed by deep carbon treatment and has the special carbon coating.