The invention discloses a
niobium and
vanadium-containing economical high-strength and high-weather-resistance
hot rolled H-shaped steel, which is characterized by comprising the following chemical compositions in percentage by weight: 0.07 to 0.12 percent of C, 0.30 to 0.55 percent of Si, 1.30 to 1.55 percent of Mn, 0.020 to 0.045 percent of P, 0.001 to 0.010 percent of S, 0.25 to 0.35 percent of Cu, 0.20 to 0.30 percent of Cr, 0.15 to 0.30 percent of Ni, 0.04 to 0.08 percent of V, 0.02 to 0.05 percent of Nb, 0.006 to 0.030 percent of Als and the balance of Fe and residual trace impurities. The invention also discloses a rolling method for the H-shaped steel, wherein the soaking temperature of a
casting blank is 1,195 to 1,225 DEG C; the start rolling temperature of a breaking down mill is 1,100 to 1,150 DEG C; the finish rolling temperature of the breaking down mill is 980 to 1,030 DEG C; the start rolling temperature of a universal roughing mill is 900 to 950 DEG C; the finish rolling temperature of the universal roughing mill is 800 to 870 DEG C; and a control total rolling
reduction rate of a universal rolling area is more than or equal to 50 percent. By the method, the
hot rolled H-shaped steel with high strength, high
toughness, high
weather resistance and good
welding performance can be prepared. At the same time, because the steel has simple metallurgic components, relatively low alloying production cost, economy and practicability, the
hot rolled H-shaped steel is the ideal hot rolled H-shaped steel used for manufacturing railway vehicles, freight semi-trailers and other industrial facilities needing the high-strength and high-weather-resistance steel.