Steel Bar for Pre-stressed Concrete, short for PC Bar is invited by High-frequency Cooking of Japan Co., Ltd in end of 1906s. It was developed as high-tech pre-stressed steel material and granted Japan national patent in year 1946. It belongs to average strength level pre-stressed products with a lot of advantages such as high strength and toughness, low relaxation, high gripping force combined with concrete, high weld-ability, high forge-ability, saving in material(20mm hot-rolled steel bar can be taken place by 10.7mm PC bar). It was used widely in high-strength post-tension and concrete centrifugal tubular pipe, electrical pole, elevated bridge pier, railroad tie etc all over the world, and has a very broad market prospect especially in Asia area.

QR-PC Bar system was developed as anchor head and wedge, and it can be applied to 6mm~16mm PC bar or wire stressing and anchoring. The wedge adopted low-carbon constructional alloy steels, and the surface hardness can reach HV800± 100 after heat treatment. The anchor head adopted high-quality constructional alloy steels, and tempered the material to improve the mechanical property. QR-PC Bar system had finished more than 1000 groups to test it's anchoring safety efficiency and final appearance. The average anchoring efficiency reached 98.8%, which meets the requirement remarked in GB/T5223.3-2005, GB/T228 and correspondingly technical specification referred in FIP.

QR-PC Bar had exported to Europe America Asia areas, and produced favorable comment from the customers.