Isfahan Iron Smelting Company, which was called Ariyamehr Iron Smelting Factory before the 1357 revolution, is the first and largest producer of construction steel and rails in Homeland. Also, Zob Ahn Isfahan is the largest steel company in Iran in terms of variety of products, and it produces all kinds of construction and industrial steel sections with a capacity of 3.6 million tons of finished products. In 1344, according to the agreement between Homeland and the Soviet Union, the Russians undertook to build the Arak Machine Building and Iron Smelter in Isfahan, along with the export of Iranian gas to the Soviet Union.