本发明公开了一种用于钢结构建筑的高强度耐火钢及其制备方法，属于建筑结构用钢技术领域，解决了现有的高强度耐火钢的成本较高的问题。其包括如下组分：C≤0 .20wt .％、Mo 0 .15-0 .20wt .％、Nb 0 .01-0 .06wt .％、Ti 0 .01-0 .10wt .％和V 0～0 .06wt .％。制备方法采用两阶段热轧和一阶段温轧的方式轧制。上述高强度耐火钢可用于钢结构建筑。

The invention discloses a high strength refractory steel for steel structure building and a preparation method thereof, which belongs to the technical field of steel for building structure and solves the problem of high cost of existing high strength refractory steel. It includes the following components : C ≤ 0.20 wt. %, Mo 0.15 - 0.20 wt. %, Nb 0.01 - 0.06 wt. %, Ti 0.01 - 0.10 wt. % and V 0 – 0.06 wt. %. The preparation method is two-stage hot rolling and one-stage warm rolling. The above high strength refractory steel can be used for steel structure buildings.