The chemical composition is stable up to standard (the company is equipped with pre-furnace testing equipment to test each furnace molten steel to ensure that the product is cast after reaching the standard).
In addition to Fe, also contains and other cast iron carbon in the form of graphite precipitation, if the precipitation of graphite sheet-like cast iron is called gray cast iron or gray cast iron.
Cast iron is a carbon content of more than 2.11% iron carbon alloy, by industrial pig iron, scrap steel and other steel and alloy materials through high temperature melting and casting molding to get.