980 MPa grade cold rolled steel-sheets with excellent formability contributing to improved performance of safety in impacts and reduced body weight

In recent years, 980 MPa grade cold rolled steel-sheets have been applied increasingly to automotive parts in order to improve collision safety (crashworthiness) and to reduce body weight Kobe Steel has already provided several types of 980 MPa steel sheets in response to the demand for improved formability. Both 'High EL type' for body structure parts and 'EL- Delta *l balanced type' for seat structure parts show excellent formability compared to Dual-phase steel sheets. This article focuses on the features, including the formability, of the two developed steel sheets.