天津钢线钢缆集团从意大利引进的生产能力为6万t、产品最大直径为23 mm的预应力钢绞线生产线已进入生产阶段,并已试制成功1×7-21.6 mm钢绞线。经权威部门检定为1 770 MPa低松弛级,产品各项性能指标均达到国际领先水平。我国第一根1×7-21.6 mm预应力钢绞线诞生 Tianjin Steel Wire & Cable Group introduced from Italy the production capacity of 60,000 t, the maximum diameter of 23 mm product line of prestressed steel strand has entered the production phase, and has been successfully trial 1 × 7-21.6 mm strand. The authority of the department for the test of 1 770 MPa low relaxation level, the product performance indicators have reached the international advanced level. China’s first 1 × 7-21.6 mm prestressed strand was born