In 1317 AH, a 53,000-ton iron smelting factory was purchased from Krupp, Germany, and by September 1320, when Iran was occupied, 8,000 tons of these machines reached the factory that was being built in Karaj. The factory building was also under construction. But with the occupation of Homeland and the capture of the German engineers working in the factory, the operation was stopped, and only the building of the part of the factory where the machinery was supposed to be stored continued.