PT Gunawan Dianjaya Steel Tbk (GDS) is a metal manufacturing company that provides steel products. The company offers products such as steel plates for general use; low carbon structural steel plates, high strength low alloy structural steel plates, steel plates for boilers and pressure vessels; steel plates for ship building; hull structural steel plates (mild steels), high strength hull structural steel plates (high tensile steels). Its production processes include 4-high roughing and finishing mill, hot leveler, cooling bed, inspection, plate cutting, stenciled, shipment, slabs, slab cutting, reheating furnace, dividing shear, and others. The company products find its application in the areas of industrial machinery, construction equipment, pipes, buildings, welded-beams, power plants and bridges. GDS is headquartered in Surabaya, Indonesia.