Patent ID: 10876184

Abstract:
A process for making a hot rolled high strength steel (HRHSS) product including the steps of casting a steel slab having, in weight percent, C: 0.18-0.22, Mn: 1.0-2.0, Si: 0.8-1.2, Cr: 0.8-1.2, S: 0.008 max, P: 0.025 max, Al: 0.01-0.15, N: 0.005 max, Nb: 0.02-0.035, Mo: 0.08-0.12, the remainder iron (Fe) and incidental impurities, hot rolling the steel slab into strip at a finish rolling temperature (FRT) of 850-900° C., cooling the hot rolled strip at 40° C./s or more over a run out table (ROT) until the strip reaches 380-400° C., coiling the hot rolled strip, and then air cooling to room temperature.