Cast iron pipes have a higher yield strength, with a yield strength of 40k, compared to cast steel which only has a yield strength of 36k. Additionally, in most municipal applications, such as water, saltwater, and steam, cast iron exhibits superior corrosion and oxidation resistance over cast steel. Due to the spherical graphite microstructure of cast iron, it is superior to cast steel in reducing vibration capabilities, thus contributing to lower stress. One significant reason to choose cast iron is its lower cost compared to cast steel, making the material more popular, with increased casting efficiency and reduced machining costs for cast iron.