Steel Bar for Prestressed Concrete, which is called PC bar for short, is prestressed steel material applied high-level of technology and belongs to a material with the intermediate prestressed strength level. PC bar complies with SNI 7701:2016. Because of its high strength and roughness, low relaxation, strong binding force with concrete, good weldability and easy for upsetting, saving in material. It has been widely used in prestressed components such as strong strength prestressed or concrete centrifugal pipe pile, electrical pole, elevated pier, railroad tier, etc.