Steel making in Differdange, Luxembourg
started in 1900 on ground of the Société Anonyme des Hauts-Fourneaux de
Differdange with three blast furnaces and a Thomas (Bessemer) steel
From 1901 on the world famous wide-flange H-beams rolled directly from
an ingot, invented by Henry Grey, were produced in Differdange. Seven
years before the Bethlehem steel company installed a Grey mill in
In 1903 Differdange became part of German Entrepreneur Hugo Stinnes’
Deutsch-Luxemburgische Bergwerks- und Hütten-AG.
In 1920 the Hauts-Fourneaux et Aciéries de Differdange, St. Ingbert,
Rumelange (HADIR) took over the site.
A narrow strip mill and a tube mill were installed in the 1950ies. A new
converter steel mill and two new blast furnaces went into production in
HADIR was absorbed by ARBED from Luxemburg in 1967.
A BOF shop was built in 1972.
The last blast furnaces was closed down in 1980.
In 1994 the new 150 ton twin shell DC-electric arc furnace started
By 2002 ARBED merged with the French USINOR and the Spanish ACERALIA to
form the world's largest steel group ARCELOR. In 2006 ARCELOR was
absorbed by Mittal Steel.
AM Differdange rolls he world’s largest beams up to 60 meters long and
weighing more than 25 tons each.