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Aluzinc®: steels with aluminium-zinc coating

Aluzinc® steels with aluminium-zinc coating

Aluzinc® is a steel substrate coated on both sides with an aluminium-zinc alloy. The composition of the coating is: 55% aluminium, 43.4% zinc and 1.6% silicon.
The excellent corrosion resistance of Aluzinc® is a result of the properties of the two metallic substances: the barrier effect of the aluminium present on the surface of the coating and the sacrificial protection of zinc.

Thanks to a thin transparent layer of aluminium oxides on the top surface of the coating, this appearance is preserved when aging.
Aluzinc® offers additional advantages:

    - Good corrosion resistance at high temperatures
    - Good abrasion resistance because of its surface hardness
    - Excellent thermal and light reflectivity

Aluzinc® HFX
High Formability combined with exceptional corrosion properties for seam roofs

  • Aluzinc® HFX is an AZ base material (55% Al, 43,5% Zn) with improved aptitude to deep drawing
  • is particularly adapted to processes like the standing seam roofs & accessories
  • its excellent corrosion properties of classical Aluzinc® combined with high formability properties
  • it can replace pure zinc at a much lower cost
  • AZ HFX used with a coating thickness of AZ 185 comes with 25 years warranty


Aluzinc® can be supplied oiled and/or with a chemical surface conversion, or with an Easyfilm® thin organic coating.




  Technical sheet ArcelorMittal Flat Carbon Europe

ArcelorMittal Flat Carbon Europe offers a 25 year product warranty for Aluzinc®

Download here:

  New Aluzinc® warranty: 25 years
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