本发明公开了一种120mm~150mm厚度超低温韧性耐火耐候钢,其包含如下质量百分比的化学成分:C:0.09~0.12、Si:0.20~0.40、Mn:1.10~1.20、P:≤0 .010、S:≤0.003、Nb:0.025~0 .035、V:0.025~0.035、Mo:0.40~0.50、Ni:0.50~0.60、Cu:0.25~0 .35、Cr:0.2~0 .3、Als:0.30~0.50,其它为Fe和残留元素。与现有技术相比,本发明得到的120mm~150mm厚度超低温韧性耐火耐候钢采用周期浸润腐蚀试验,耐腐蚀性能优异,可广泛应用于超高层钢结构、海洋环境平台钢结构等。
The invention discloses a 120mm ~ 150mm thickness ultra-low temperature ductile refractory steel, which contains chemical composition C: 0.09 ~ 0.12, Si: 0.20 ~ 0.40, Mn: 1.10 ~ 1.20, P: ≤0. 010, S: ≤0.003, Nb: 0.025 ~ 035, V: 0.025 ~ 0.035, Mo: 0.40 ~ 0.50, Ni: 0.50 ~ 0.60, Cu: 0.25 ~ 0.35, Cr: 0.2 ~ 0.3, Als: 0.30 ~ 0.50, the rest are Fe and residual elements. Compared with the prior art, the 120mm ~ 150mm thickness ultra-low temperature ductile refractory steel obtained by the invention adopts periodic infiltration corrosion test, and has excellent corrosion resistance, which can be widely used in super high-rise steel structure and Marine environment platform steel structure.