Cast iron refers to a group of iron alloys that have a high percentage of carbon (> 2 %) and silicon (> 1.5 %) as well as e.g. manganese, chrome or nickel. Grey iron contains carbon in the form of graphite.
Cast iron with flake graphite (GGL/GJL)
The graphite structure defined as lamellar graphite determines the characteristic properties of this material group e.g. strength, machinability, wear resistance, damping characteristics, heat conductivity, etc.
Cast iron with spheroidal graphite (GGG/GJS)
Due to the spherical formation of the graphite, the ductile cast iron acquires special properties compared to the flake graphite; tensile strength, yield strength and E-module are improved, expansion and impact strength are increased.