Our Differdange mill today

Today, ArcelorMittal Europe – Long Products’ Differdange mill still produces similar beams. Thanks to several modernisation programmes over the years, today the mill can produce the heaviest beam blanks and the longest and heaviest beams in the world.

Moreover, the QST (Quenching and Self-Tempering) process is being used to produce a new generation of HISTAR® beams of exceptionally high quality.

Thanks to their high yield strength, outstanding robustness, and very good welding properties, they have made Differdange famous worldwide. They are used in the construction of high-rise buildings all over the world and will probably last at least 120 years - just like their ‘great-grandfathers’ in Bonn.

Our steel found in mint condition in 1904 house

In the city of Bonn in Germany, steel beams produced by ArcelorMittal's Differdange mill were recently discovered in perfect condition in a centenary house during a remodelling project.

First-class quality after almost 120 years

Blending in with the white interior design of the house, the beams could almost go unnoticed. This was exactly the case until the owner, Paul Udo Hanus, decided to renovate. He was astonished by his discovery: 'DIFFERDINGEN NP 12' stood out on the massive steel beams that were "in perfect condition".

Wondering where the beams could have been manufactured, Paul’s internet search led him to ArcelorMittal. He thought it would be a nice idea to contact the company. In an email, he highlights the perfect condition of the steel beams and pays compliment to the colleagues and employees of 1904 and to ArcelorMittal for the first-class quality that is still maintained today. Steel beams were manufactured under difficult, industrial conditions at that time, which is why the long durability is even more gratifying.

ArcelorMittal Europe Communications