Valais, Switzerland

Aluminium plants in Valais, Switzerland

In Valais, Constellium employs over 700 people and is organized around three production facilities: two casthouses based in Steg and Chippis, as well as plate and extrusion shops located in Sierre.

About Constellium’s plants in Valais

The three production plants serve two of Constellium’s operational business units: Aerospace and Transportation, and Automotive Structure and Industries.

The high quality and valued-added aluminium products are used in aerospace, general and special engineering, and defense market segments.

Constellium’s plants in Valais at a glance

Constellium Singen plants in Valais

Constellium Valais SA
Route des Laminoirs 15
3960 – Sierre

See location on our interactive map

    Employees: over 700
    Surface: 500,000 m² (123 acres); 100,000 m² (24 acres) covered surfaces
    Certifications: ISO 14001, OHSAS 18001, ISO 9001, EN9100, Nadcap heat treating, Nadcap material testing (including ISO/IEC 17025), IRIS
    Products: aerospace plate, general engineering plate, armor plate and high-speed train large profiles
    Markets: aerospace, industry, defense

Constellium’s Valais general terms and conditions of purchase


Valais plants’ manufacturing capabilities

Casting (Steg and Chippis)

The Steg casthouse is dedicated to applications for the aerospace and transportation markets. It produces aluminium slabs for transformation at Constellium’s hot mill at Issoire, France. The casthouse consists of melting and casting furnaces, conventional and electromagnetic casting, homogenizing furnaces, as well as a saw and milling machine.

The Chippis casthouse produces aluminum bars and billets, which are transformed in Constellium’s plants at Sierre (Switzerland) and Singen (Germany).

Plate shop (Sierre)

The plate shop manufactures value-added aluminium plates in a variety of widths dedicated to industry and aerospace. The plates undergo several thermal and mechanical treatments to modify their properties according to customer needs. The plate shop consists of quenching furnaces, stretchers, straightening machines, ageing furnaces, saws and surface milling machines.

Extrusion and die shop (Sierre)

The extrusion and die shop produces large profiles used in the transportation, automotive, industry and construction sectors (including molding, machinery, tooling and general engineering). The extrusion shop is equipped with 2 large extrusion presses and furnaces for tempering, quenching and annealing, enabling us to provide highly sophisticated large sections e.g. for the rail industry. The extrusion and die shop is also equipped to perform in-house US control. Finally, added value operations (machining, welding, bending, kitting, assembly) are provided either by in-house CNC machining or in cooperation with an established and proven sub-supplier network.


Constellium’s plants in Valais are well recognized for the quality of products delivered to customers. To offer the best-in-class quality, Constellium has several laboratories in Valais:

    žThe Test Material Laboratory, where technicians work on destructive tests to characterize the mechanical properties of the products.
    The Metallurgy Expertise Laboratory, where metallurgical and microscopic tests are conducted to control the macro and microstructures of the plates produced.
    žThe Spectrometry Laboratory, to control the chemical composition of the alloys produced at the casthouse.


Extrusion and plate shop

Last update 27 June 2017 Back to top