800 MPa-grade low-cost steel for pickling battery bracket and production method of 800 MPa-grade low-cost steel

The invention relates to 800 MPa-grade low-cost steel for a pickling battery bracket. The 800 MPa-grade low-cost steel comprises the following chemical components in percentage by weight: 0.04-0.09% of C, less than or equal to 0.1% of Si, 2.0-2.5% of Mn, less than or equal to 0.018% of P, less than or equal to 0.01% of S, 0.02-0.06% of Als, 0.015-0.03% of Nb, 0.15-0.3% of Ti, less than or equal to0.006% of N and the balance of iron and inevitable impurities. In the production process, the finish rolling temperature is controlled to be 895-915 DEG C; and in the coiling procedure, low-temperature coiling is adopted, the coiling temperature is controlled to be 580-600 DEG C, a coiling off-line is put into a heat preservation cover for heat preservation and slow cooling, and the heat preservation time is controlled to be 48-75 hours. The pickling battery bracket produced by the invention has the advantages of low yield ratio, good formability and excellent welding performance; and the yield strength is 600-660 MP