Large-size 500N Australian new standard steel bar and production method thereof

The invention provides a large-size 500N Australian new standard reinforcing steel bar and a production method thereof, the rolling specification of the 500N Australian new standard reinforcing steel bar is phi 32-50 mm, and single-line rolling is adopted. Comprising the following steps of blast furnace molten iron smelting, molten iron desulfurization pretreatment, converter molten steel smelting, square billet continuous casting, heating furnace heating, rough rolling, intermediate rolling, water tank and recovery section, finish rolling, K2 water tank and recovery section, finish rolling, water tank and recovery section, double-length shearing, cooling bed shearing, fixed-length shearing, collecting and warehousing. Wherein in the rough rolling, the initial rolling temperature is controlled to be 950-1000 DEG C; the alloy cost of the steel bar is greatly reduced, and the competitiveness of export steel and enterprise benefits are improved. 本发明提供了一种大规格500N澳新标钢筋及其生产方法，500N澳新标钢筋的轧制规格为φ32～50mm，采用单线轧制，所述大规格500N