摘要：【中文】本发明涉及一种经济型管线钢的制造方法，所涉及管线钢的元素组合按wt％计量为C 0.075‑0.090，Si 0.3‑0.4，Mn 1.75‑1.90，Al 0.02‑0.04，Nb 0.01‑0.025，Ti 0.02‑0.03，[N]0.004‑0.007，S≤0.003，P≤0.015，余量为Fe及不可避免的杂质元素。制造方法包括BOF转炉冶炼—RH/VD真空脱气—150mm连铸坯—连铸坯检查清理热送加热炉—铸坯加热(保证待温时间)—高压水除鳞—轧制—ACC冷却等。本发明能够获得针状铁素体+多边形铁素体混合组织，屈服强度≥485MPa，抗拉强度≥570MPa，延伸率≥30％，‑40℃冲击功≥200J。 【EN】The invention relates to a method for manufacturing economical pipeline steel, wherein the element composition of the pipeline steel comprises 0.075-0.090 wt% of C, 0.3-0.4 wt% of Si, 1.75-1.90 wt% of Mn, 0.02-0.04 wt% of Al, 0.01-0.025 wt% of Nb, 0.02-0.03 wt% of Ti, [ N ]0.004-0.007 wt% of S less than or equal to 0.003 wt% of P less than or equal to 0.015 wt% of the steel, and the balance of Fe and inevitable impurity elements. The manufacturing method comprises BOF converter smelting, RH/VD vacuum degassing, 150mm continuous casting billets, continuous casting billet inspection, cleaning, heat transfer to a heating furnace, casting billet heating (ensuring the waiting time), high-pressure water descaling, rolling, ACC cooling and the like. The invention can obtain acicular ferrite and polygonal ferrite mixed structure, the yield strength is more than or equal to 485MPa, the tensile strength is more than or equal to 570MPa, the elongation is more than or equal to 30 percent, and the impact energy at minus 40 ℃ is more than or equal to 200J.