Refractory anti-seismic construction steel for high-toughness welding structures, and production method thereof

The invention discloses refractory anti-seismic construction steel for high-toughness welding structures, and a production method thereof, and solves the problem that the traditional construction steel is high in Mo that is a noble alloying element, high in producing-processing cost, low in refractory property and poor in anti-seismic performance. Based on the chemical composition of steel in percentage by weight, the steel comprises 0.05 to 0.13 percent of C, 0.10 to 0.60 percent of Si, 0.80 to 1.80 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.010 percent of S, 0.15 to 0.50 percent of Mo, 0.15 to 0.50 percent of Cr, 0.015 to 0.050 percent of Nb, and 0.010 to 0.050 percent of Als, at least one of 0.01 to 0.10 percent of V, 0.005 to 0.020 percent of Ti, 0.05 to 0.50 percent of Ni, 0.0010 to 0.020 percent of RE and 0.0010 to 0.010 percent of Ca, and the balance of Fe and inevitable impurities. The steel has the advantages of low content of Mo that is a noble alloying element, short production process and cycle, excellent refractory and anti-seismic performance, good cold-hot machining performance and excellent low-temperature toughness and welding performance.