Cast iron is a heavy, brittle iron alloy with a high carbon content (typically 2–4%). It’s commonly found in old bathtubs, wood burners, engine blocks, guttering, and drainage pipes. Cast iron is easy to identify by its weight and the grainy, rough texture visible at a broken edge. In Auckland, cast iron scrap frequently comes from bathroom renovations and property clearances. Cast iron is graded as ferrous scrap and processed alongside other heavy melting steel. At endless metals, we accept cast iron at both our Onehunga and Wairau Valley yards — drive straight in with no appointment needed.