Thick-gauge steel with good low-temperature toughness for railway bogie and manufacturing method of thick-gauge steel

The invention provides thick steel with good low-temperature toughness for a railway bogie and a manufacturing method thereof, and is characterized in that the steel plate comprises the following chemical components in percentage by mass: 0.06-0.10% of C, 0.15-0.30% of Si, 1.2-1.3% of Mn, less than or equal to 0.015% of P, less than or equal to 0.003% of S, 0.015-0.035% of Al, less than or equal to 0.0040% of N, less than or equal to 0.0030% of O, less than or equal to 0.00015% of H and the balance of Fe and inevitable impurities. The steel plate has excellent welding performance and good low-temperature toughness, and is suitable for railway vehicle facilities and construction of high-speed rails, subways and the like in alpine regions. 本发明提供了一种厚规格低温韧性良好的铁路转向架用钢及其制造方法，其特征在于，所述钢板化学成分组成及其质量百分含量为：C：0.06-0.10%，Si：0.15-0.30%，Mn：1.2-1.3%，P≤0.015%，S≤0.003%，Al：0.015-0.035%，N≤0.0040%，O≤0.0030%，H≤0.00015%，余量为Fe和不可避免的杂质。钢板具有焊接性能优异、低温韧性良好，适用于高寒地区的高铁、地铁等铁路车辆设施及施工建设。