 After the war period, the club was constantly competing with Aris for the Thessaloniki championship, which gave upon its winner the right to participate in the Greek championship.Iraklis participated in the 1947 Greek Cup final, where was defeated 5–0 by the dominant Greek team of that era, Olympiacos.In the 1950s, the team solidified its position among the top teams in Greece along with Olympiacos, AEK Athens, Panathinaikos, Aris and PAOK.