At present the application of high strength steel increases obviously in body mass reduction solution scheme of car design to decrease the body mass by more than 20%

but is still lower 由an the index where using aluminium or aluminium-magnesium alloy to decrease the body mass by 40%

The future design idea for steel car body is the goal to decrease the body mass by 35% in the way of development of third generation high strength steels

new body parts manufacturing process and forming design. The characteristics of high strength steels

the body mass reduction solution scheme and selection of materials

and the grades

chemical composition

properties

application progress and forecast of high strength steels are presented in this paper.