The cold-rolling process is often used to produce steel tubes. The entire manufacturing process can be divided into three major stages. In the first stage, an uncoiled steel sheet is cold-bent transversely into an initial circular shape. In the second stage, welding is applied to close two longitudinal edges of the circular tube resulted from the first stage. In the final stage which is so-called shaping, the welded circulate steel tube is then cold-formed into the final cross-sectional shape (e.g., circular, rectangular, elliptical shapes) by rolling. This paper aims to investigate mechanical behavior induced by the shaping process in different cold-formed steel tubes with various cross-sectional shapes. A nonlinear finite element-based method is presented for predicting the residual stresses and equivalent plastic strains in cold-formed steel hollow sections. In this method, residual stresses and equivalent plastic strains induced by the coiling, uncoiling and transverse bending processes are predicted analytically, and then the results were specified as the initial state for the subsequent nonlinear finite element simulation of the shaping process. Through the finite element simulation, residual stress distributions over the cross sections can be determined accurately...