Ascometal® offers :
  • A comprehensive network based in France
  • Complementary production processes (continuous casting and ingot process)
  • Diversified sources of supply
  • Full controlled process and quality tracking
2 steel producing plants : Fos-sur-Mer, Hagondange
3 finishing centers : Custines, Le Marais, Les Dunes
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Les Dunes

The Dunes mill, near Dunkirk (Northern France), specializes in the manufacture of heavy-section products which are exported worldwide.


Rolled round bars80 to 300 mm
Peeled round bars76 to 300 mm

Main markets

Mechanical Engineering Industry, Oil and Gas, Bearings

Metallurgical processing
  • Dunes Plant is supplied via Concast Route and Ingot Route, consistent with its transformation and fnishing processes and compliant with customers’ requirements.
Casting process
  • Dunes Plant is supplied via:
    • Concast Route
    • Ingot Route
Heat treatments
  • Continuous quenching line, combined with tempering /stress-relieving furnaces
  • Furnaces dedicated to normalizing and various types of annealing treatments (stress relieving, spheroidizing, isothermal…)

The heat treatment line is the most efficient in Europe for large diameter long products.

Finishing and inspections
  • Equipment for straightening, peeling and cutting to length, capable of achieving tight tolerances
  • In-line inspection : eddy current surface defect detection, magnetic particle inspection, ultrasonic examination, dimensional and anti-mix checks
  • The 100% control bench allows to meet the most stringent O&G Specifcation requiring testing as per API 7.1 Standards and Angle Beam testing. The bench is equipped with Phased Array technology: checking 100% of the volume and defect detection of AVG1.

ISO 9001 • IATF 16949 • ISO 14001 • ISO 45001 • CE138 • ISO CEI 17025• ISO 50000


ABS, Bureau Veritas, DNV, Germanisher Lloyds, LRS, RINA, TÜV.

Postal address : ASCOMETAL® — site des Dunes
Usines des Dunes BP41
F-59941 Dunkerque Cedex 2

Plant address : ASCOMETAL®, Usines des Dunes
Rue des Aciéries
59495 Leffrinckoucke
Tél. : +33 3 28 29 60 00
Fax : +33 3 28 29 60 01

Coordonnées GPS
N 51.055207
E 2.457841

Access map