Scrap cast iron prices can change without notice; scrap metal companies update their prices daily or weekly, but may change their prices at any time. Factors such as price changes on worldwide metal futures markets impact scrap metal pricing.
The law of supply and demand influences the price of scrap metals, including cast iron. Companies such as GoldenRecycling.org set their prices based on existing wholesale rates for large volumes of metal. Its prices are usually valid for one week, but it adjusts them as market conditions change. RockawayRecycling.com updates its scrap metal prices whenever the prices change at the scale; otherwise, it updates online prices daily.