HRB-400 Minimum Yield Strength : 58,000 PSI [400 MPA]Minimum Tensile Strength : 78,300 PSI [540 MPA]Elongation (%) : 16% After Fracture, 7.5% At Max Force HRB-500 Minimum Yield Strength : 72,500 PSI [500 MPA]Minimum Tensile Strength : 91,350 PSI [630 MPA]Elongation (%) : 15% After Fracture, 7.5% At Max Force KEY FEATURES Unique Chinese standard bars.Approved for construction on CPEC.Manufactured from specialComposition of billet.Long life bars.