What Does Gray Cast Iron Mean?
Gray cast iron is a type of iron with carbon content greater than 2% and a graphitic microstructure. It is one of the most common types of cast iron used in applications. it is relatively inexpensive, malleable and durable.
Corrosionpedia Explains Gray Cast Iron
Gray cast iron is named after the color gray due to the formation of gray microstructure tears when fractured. The low degree of shrinkage in gray cast iron makes it favorable for industrial engineering applications since it has a varied tensile strength range from less than 20,000 psi to over 60,000 psi, and hardness from 100 to 300 BHN (Brinell hardness number).