Nowadays, data have been rised by considerable rate in organization. Due to the daily increasing, needing methods, which analyse such data and discover hidden knowledge of them, is necessary. Data mining is a field which provides some tools for analyzing mass databases, discovering patterns and knowledge of this sources. Mobarakeh Steel Company is one of the important industry of our country which has worth datasets and providing good opportunity for using data mining techniques and discovering hidden knowledge of this data. Nowdadays,