2019-6-6 · Hainaut-Sambre was a Belgian group of steel companies based in the Charleroi region, it was founded in 1955 by the merger of Usine Métallurgiques du Hainaut (based in Couillet, Charleroi), and the metal making division of Sambre et Moselle (based in Montignies-sur-Sambre, Charleroi). The company absorbed another Charleroi based steel group ...