High-strength strapping steel with tensile strength larger than or equal to 1080 MPa and manufacturing method of high-strength strapping steel

The invention discloses high-strength strapping steel with the tensile strength larger than or equal to 1080 MPa and a manufacturing method of the high-strength strapping steel. The high-strength strapping steel with the tensile strength larger than or equal to 1080 MPa comprises, by weight, 0.20%-0.24% of C, 0.01%-0.03% of Si, 0.90%-1.20% of Mn, 0.01%-0.025% of P, smaller than or equal to 0.025% of S, 0.003%-0.005% of B, 0.03%-0.06% of Ti, 0.020%-0.050% of Als and the balance Fe and inevitable impurities. The steel is produced through the steps of molten iron pretreatment, converter treatment, alloy fine adjustment station treatment, RH treatment, continuous casting, hot rolling, controlled cooling, acid pickling, cold rolling, tempering and bluing, the steel has the characteristics of high strength, good toughness and corrosion resistance, the tensile strength is larger than or equal to 1080 MPa, and the ductility A30 is larger than or equal to 9%. 本发明公开了一种抗拉强度≥1080MPa级高强捆带钢及其制造方法，所述抗拉强度≥1080MPa级高强捆带钢，包括以下重