Article 1
Acerinox SA, ALZ NV, Acciai Speciali Terni SpA, Avesta Sheffield AB, Krupp Hoesch Stahl AG (Krupp Thyssen Nirosta GmbH as from 1 January 1995), Thyssen Stahl AG (Krupp Thyssen Nirosta GmbH as from 1 January 1995) and Ugine SA infringed Article 65(1) of the ECSC Treaty, in the case of Avesta Sheffield from December 1993 to November 1996 and, in the case of the other undertakings, up to the date of this Decision, namely by modifying and by applying in a concerted fashion the reference values used to calculate the alloy surcharge, such practice having both the object and the effect of restricting and distorting competition within the common market.