Definitions for "Gray Iron"
Keywords:  graphite, flake, fracture, iron, cast
Cast iron, which contains a relatively large percentage of the carbon present in the form of flake graphite. The metal has a gray fracture.
A pig iron in which the carbon takes the form of graphite, giving the fracture a dark color.
Cast iron that has a relatively large proportion of the graphitic carbon present in the form of flake graphite. The metal has a gray fracture.