1. An endoprosthesis containing multiphase ferrous steel. 2. The endoprosthesis according to claim 1, in which the multiphase steel is a two-phase steel. The endoprosthesis according to claim 1, wherein the multiphase steel is a complex phase steel. The endoprosthesis according to claim 1, in which the multiphase steel is duplex steel. The endoprosthesis according to claim 1, wherein the multiphase steel is TRIP steel with ductility due to martensitic transformation. The endoprosthesis according to claim 1, in which the multiphase steel is TWIP steel with twin induced ductility. The endoprosthesis according to claim 1, wherein the multiphase steel is an improved and fractionated steel (Q&P steel). An endoprosthesis according to claim 1, comprising a device expanding in diameter. The endoprosthesis of claim 8, comprising a stent expanding with a balloon. An endoprosthesis according to claim 9, containing a stent graft. 11. An endoprosthesis according to claim 1, comprising a filter device. An endoprosthesis according to claim 1, comprising an orthodontic wire. An endoprosthesis according to claim 1, comprising an electric crimp connector. The endoprosthesis according to claim 1, further comprising polytetrafluoroethylene (PTFE). The endoprosthesis according to claim 1, additionally containing a biologically active substance. A method of manufacturing an endoprosthesis, which includes the steps of giving a given shape to a flat sheet of multiphase steel, giving the above specified shape a tubular shape, compressing the resulting tubular shape on a balloon of the endovascular delivery system, delivering this shape to a pathologically altered area and expanding it in this section .17. A method of manufacturing an endoprosthesis, which includes the steps at which a tubular structure made of multiphase steel is given the specified1. Эндопротез, содержащий многофазную железистую сталь.2. Эндопротез по п.1, в котором многофазная сталь является двухфазной сталью.3. Эндопроте
