By its surprising fast growth, the corporation Mittal Steel became a determining factor in the steel business. Through the merger with ISG the corporation became the world's biggest steel producer and thus reached a global dimension. The deciding question of today is the further development of the steel business. The survey conducted by the author explores this question by evaluating key indications of this development and giving predictions for the future development.To illuminate the line of possible development, theories of globalisation and societal development are applied to the Mittal Steel Corporation. In addition, theories of strategy and market competition are used to define the profile of the corporation and to show the market position in comparison to other steel corporations.Basic strategies to improve the steel industry's vitality and sustainability are formulated.