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Aim of the present work is to improve the production of laserwelded flux cored wires with the help of Finite Element Analysis in Abaqus. This flux cored wires are used as welding consumables. To simulate the whole production process for every variety of input parameters is far too time-consuming particularly with regard to the filling. The production process is as following: after roll forming of a strip to a U-shape it is filled continuously with flux. This powder consists of up to 20 different substances. Afterwards the profile is closed to a tube and the edge is laserwelded. At last the diameter of the tube is reduced to 1.2 mm. The reduction step is investigated and subject of the present work. Observations have shown the most abrasion of the working dies in reduction steps where it is not expected due to the calculated true strain sequence. Therefore, the influence of the filling on the roll drawing process has to be taken into account. This is not easy because the process starts with loose multicomponent powder and ends with high compaction. It is hard to cover these demands with a single model for powder behaviour. So a phenomenological approach is established to solve the problem. The influence of the powder is described as a load which only appears in the projected contact area. Consequently, it becomes possible to study parameters on the reduction like different quantities of the multicomponent powder, the reduction sequence of the roll drawing process and the geometry of the rolls.