15.24mm 2230 Mpa PC Strand

Introduction and application scope of 15.20mm 2230MPa low relaxation prestressed steel strand I. Core parameters and characteristics of the product Basic specifications: nominal diameter 15.20mm, twisted by 7 high-strength steel wires (1 center wire + 6 peripheral wires), cross-sectional area of ​​about 140mm², standard tensile strength of 2230MPa, far exceeding the conventional 1860MPa steel strand, belonging to the ultra-high strength level. Low relaxation performance: Under 70% nominal stress, the relaxation rate of 1000 hours is ≤1.5%, and the stress loss is only 1/5 of that of ordinary steel strand, which greatly reduces the subsequent maintenance cost. Mechanical properties: elastic modulus 195-200GPa, elongation ≥3.5%, both high strength and toughness, in line with the high standard requirements of GB/T 5224-2014. 2. Typical application scenarios Application fields Specific scenario examples Advantages Bridge engineering Cables of large-span cable-stayed bridges, main cables of…