One of the advantages of gray iron castings is their good casting properties. Gray iron has high liquid fluidity, is easy to cast, and has a low solidification shrinkage rate, can get a relatively small casting size. In addition, the shrinkage performance of gray iron castings is better, which can effectively avoid casting defects and improve the quality stability of products.

Gray iron castings have high strength and hardness. The graphite particles in gray iron can effectively prevent the slip of the crystal and improve the strength and hardness of the material. Therefore, gray iron castings have better durability and anti-wear properties in the case of greater load and wear.

Gray iron castings also have some disadvantages. The plasticity and toughness of gray iron castings are poor, and it is easy to fracture. The thermal expansion coefficient of gray iron castings is large, which is easy to produce thermal stress, resulting in deformation and cracking of castings. In addition, gray iron castings have poor corrosion resistance and are easily affected by environmental factors such as oxidation and corrosion.

Although gray iron castings have some shortcomings, they are still widely used in many fields. Gray iron castings are widely used in the field of machinery manufacturing, such as engine cylinder block, machine tool bed and so on. Gray iron castings also have important applications in the field of construction, such as drainage pipes, manhole covers, etc. In addition, gray iron castings are also widely used in automobile manufacturing, agricultural machinery manufacturing, shipbuilding and other industries.

Gray iron casting, as a common casting material, has a series of advantages and disadvantages. When selecting gray iron castings, it is necessary to comprehensively consider the specific application needs and environmental conditions. With the continuous progress of science and technology, the performance and quality of gray iron castings are also constantly improving, and there will be broader application prospects.