Wear resistance and shock absorption are good. Because graphite in cast iron is good for lubrication and oil storage, it has good wear resistance. Similarly, due to the presence of graphite, the vibration resistance of gray cast iron is better than steel. The process performance is good. Cast iron has a high carbon content and is close to the eutectic composition, so the melting point is relatively low, the fluidity is good, and the shrinkage rate is small, so it is suitable for casting complex or thin-walled castings.