Mansourian replaced Omid Namazi, who parted company with the Isfahan-based football team by mutual consent Wednesday night.
Under coaching of Namazi, Zob Ahan earned two wins, five draws and suffered four loses.
Zob Ahan sits 11th in Iran’s 16-team league, 15 points adrift of leader Padideh.
Mansourian was without a team since leaving Esteghlal in September 2017.
The 47-year-old started his coaching career in 2009 taking charge of Pas Hamedan.
Mansourian has also coached Naft Tehran and Esteghlal in Iran football league.