Patent ID: 8702876
Filing Date: 2014-04-22
Classification: C21D,C22C

Abstract:
1. A steel plate, wherein the composition of said steel plate consisting of (wt. %: percent by weight): C: 0.04-0.08, Si: 0.05-0.70, Mn: 1.30-2.20, Mo: 0.10-0.25, Nb: 0.03-0.10, V: 0.03-0.45, Ti: 0.002-0.040, Al: 0.02-0.04, B: 0.0010-0.0020, Fe: Balance, and unavoidable impurities, said steel plate has a bainite battened structure, said steel plate having a yield strength of 800-875 MPa, and said steel plate having a welding crack susceptibility index of P cm ≦0.20%.