Forged iron is made inside a furnace stoked with alternate layers of coking iron then poured into molds. Following the iron cools off, the sand is cleaned off. The Chinese were the 1st to implement cast iron[1] within the 6th century Advertisement applying it as assist for pagodas along with https://www.cylex.us.com/company/naddour%27s-custom-metalworks-9223264.html