Advantages of cast iron balls include: 1. High strength: Cast iron ball has high strength and hardness, can withstand greater external force and pressure. 2.Compared with the ball of other materials, the price of cast chromium alloy ball is more economical. 3. Corrosion resistance: Cast iron ball has good corrosion resistance and can resist the corrosion of some chemical substances. 4. Cast chromium alloy ball has good thermal stability and can maintain good performance in high temperature environment. 5. Cast chromium alloy ball has high tensile strength, can withstand large tension, not easy to break. 6. Wear resistance: Cast iron ball has good wear resistance and can be used for a long time in the environment of friction and wear.