钢号旧钢号主 要 化 学 成 分  %机械性能   CSiMnssMPasbMPad5%用途Q29509MnNb£0.120.20~0.600.80~1.203002804204002321桥梁、车辆 12Mn£0.160.20~0.601.10~1.503002804504402119锅炉、容器、铁道车辆、油罐等Q34516Mn0.12~0.200.20~0.601.20~1.603502905204802119桥梁、船舶、车辆、压力容器、建筑结构 16MnRe0.12~0.200.20~0.601.20~1.6035052021建筑结构、船舶、化工容器等Q39016MnNb0.12~0.200.20~0.601.20~1.604003805405201918桥梁、起重设备等 15MnTi0.12~0.180.20~0.601.20~1.604003805405201919船舶，压力容器，电站设备等Q42014MnVTiRe£0.180.20~0.601.30~1.604504205605401818桥梁，高压容器，大型船舶，电站设备等 15MnVN0.12~0.200.20~0.601.30~1.704504306005801718大型焊接结构，大桥，管道等Q46014MnMoV0.10~0.180.20~0.501.20~1.6050065016中温高压容器（<500℃） 18MnMoNb0.17~0.230.17~0.371.35~1.655205006506501716锅炉、化工、石油高压厚壁容器（<500℃）