Recently, the tailored blanking technique using high tensile strength steels begins to be adopted in car industry to reduce the weight of automotive bodies without any decreases of their stiffness and strength. Therefore, it is important to storage of the fundamental data concerning the technique such as tensile, compressive, shearing and fatigue properties of welded joints. In this research, the effect of pre-fatigue on the impact tensile properties of the welded butt joint of high strength steel plates was investigated by means of the split Hopkinson bar method for tensile test.
