SteelAsia Calaca steel plant, also known as SAMC Calaca, M3, Calaca Works, is a steel plant in Calaca Batangas, Calabarzon, Philippines that operates electric arc furnace (EAF) technology.
SteelAsia Calaca Works operates an integrated rebar line directly integrated with its scrap-based billet production. The original 300 ttpa mill was established in 1999 by Bacnotan Steel Industries, which was mothballed within a year into operation due to the Asian financial crisis. SteelAsia acquired the plant in 2007 and re-commissioned the plant in 2008 after upgrading the facility to 500 ttpa capacity.[1] In 2023, the EAF unit was upgraded by German company SMS's AI technology to increase output without increasing its carbon footprint[2]. In November 2025, the Philippines Nuclear Research Institute ordered to suspend the plant operation due to 23 containers containing hazardous zinc-dust which were denied entry by Indonesia. The case is under investigation[3].
To access additional data, including an interactive map of steel plants, a downloadable dataset, and summary data, please visit the Global Iron and Steel Tracker on the Global Energy Monitor website.
