Open-hearth steel is a specific type of steel that was commonly produced in the early 20th century. However, this term has largely fallen out of use, replaced by more modern production methods and steel types. Some synonyms for open-hearth steel include basic oxygen steel, electric arc furnace steel, and continuous casting steel. While each of these methods produces its own unique type of steel, they have largely replaced open-hearth steel in modern manufacturing. Basic oxygen steel is produced using a combination of oxygen and scrap metal, while electric arc furnace steel uses an electric arc to melt scrap metal. Continuous casting steel is produced using a continuous casting process that yields a higher quality finished product.