 The foundry of the firm was supplied by three 12 ton Martin process steel converters including facilities for rolling wheels and axles, a casting shop, and running gear manufacturing.In 1928 the company "Usines Gustave Boël" was formally formed.In the 1930s and 40s expansion included two blast furnaces, sinter plant, additional coke ovens and converters, and a 25-ton arc furnace.