The cast iron grinding ball is excellent in surface quality, toughness, and resistance to impact and abrasion. It won't crack and lose circularity easily. The stamping method that we use is that heating the metal until the temperature reaches 1050 degrees Celsius and utilizing the metal forming machinery to exert pressure onto the mechanical properties, shape and dimension. melting process of the metal and optimize the microstructure. Meanwhile, as a result of the preservation of the complete metal flow line, the piece has superior mechanical performance to the casting with the same material. The grinding ball must use the super wear resistant material to ensure the abrasion resistance, such as researched and developed independently by some companies themselves.