This work deals with the analysis of ship production material in Vitkovice Ironworks, which belonged to the company´s main production activities in period 1891 - 1914. In this period, new patents and licenses for the production of armor plates purchased from companies Harvey, Krupp and Carnegie played an important role in the development of the company. The company´s transition to the production of war material was determined by tense atmosphere in international relations and new trends in warfare. Military material during this period became popular and very profitable commodity production. For the company that is involved in such arms, this production promised large government contracts and excessive earnings. For Vítkovice Mines, Steel and Ironworks Corporation was easiest to enter competition in the manufacture of armor plates for the construction of naval forces. This production fully met the business objectives of enterprise management, which was led from 1876 - 1893 by one of the best metallurgical experts of Austria, Paul Kupelwieser. He constantly acquainted with technological innovations in steel production in the European steel industry centers (Sheffield, Middlesborough, Essen) and the most important inventions applied in Vitkovice Ironworks. Through the transfer of information and monitoring of technological development, that were obtained by Vítkovice ironworks in the period 1891-1914, Vitkovice succeeded to get a monopoly on the production of marine armored plates and marine armored turrets for the entire area of the Habsburg monarchy. Vitkovice Ironworks were also involved in the construction of dozens of battleships, cruisers and 4 dreadnought (the most famous of them was Viribus Unitis), which fought in the World War I. The aim of the presentation is not only to describe the mentioned production activity, but also to present other important aspects linked with this issue such as: the creation and expansion of operations and investment in development, the acquisition of know-how, new patents and licenses, competition with other arms companies, the technological development and implementation of new processes in steel production and supply of ship material.