This invention is the production process of the high-strength building steel with anti-seismic, fire-resistant. This material’s chemical composition is: C: 0.04~0.08%, Mn: 1.0~1.5%, Si: 0.15~0.60%, Cr: 0.2~0.7%, Mo: 0.10~0.60%, Ti+ V+ Nb≤ 0.35%, Al: 0.01~0.05%, Cu: 0.1~0.6%, Ni: 0.1~0.6%, P: ≤ 0.008%, S: ≤ 0.002%, the remainder is iron and inevitable traces chemical element. It is smelted by converter or electric furnace, continuous casting and medium and heavy plate rolling mill is used. The rolled plate steel undergoes a quenching and tempering heat treatment process after heat preservation in the α+γ phase zone to control the microstructure ratio of bainite, martensite and ferrite, and control the strength and yield ratio of the steel. The steel shows excellent mechanical properties: yield strength ≥690 MPa, tensile strength 850~950 MPa, yield ratio < 0.85, elongation after fracture ≥ 20%, -40 ℃ KV2≥150J, yield strength at 600℃ ≥ 2/3 yield strength at room temperature. This steel is widely used in high-rise building, super-high-rise building and satisfy high strength, anti-seismic, fire resistance at the same time.
