PT Gunawan Dianjaya Steel Tbk manufactures and sells hot rolled steel plates in Indonesia. It provides steel plates for general use, such as low carbon structural steel plates and high strength low alloy structural steel plates; steel plates for boilers and pressure vessels; and steel plates for ship building, including hull structural steel plates and high tensile steels. The company also exports its products. PT Gunawan Dianjaya Steel Tbk was founded in 1989 and is based in Surabaya, Indonesia.