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Alloys

Aluminium alloys

Pure aluminium is a soft metal. But small additions of copper, zinc, manganese, magnesium, silicon make its mechanical properties good for usage in industry. Aluminium alloys are divided in two groups: wrought and cast alloys.
Cast alloys are used for castings of different machine details with complex shapes.
Wrought alloys are used for rolling, extrusion and forging processes.

Aluminium plates, rods, bars, tubes, profiles, forgings are made of wrought alloys.
KUMZ produces wrought aluminium alloys at own Casting shop.
There are tens of alloys. Field of application determines alloy with needed strength, ductility, formability, weldability and corrosion resistance.

Alloy designations

Most commonly used identification system for wrought aluminium alloys consists of four digit number which identifies the alloying elements. The first digit indicates the major alloying elements:

  • 1000 series are essentially pure aluminium.
  • 2000 series are alloyed with copper.
  • 3000 series are alloyed with manganese.
  • 4000 series are alloyed with silicon.
  • 5000 series are alloyed with magnesium.
  • 6000 series are alloyed with magnesium and silicon.
  • 7000 series are alloyed with zinc.
  • 8000 series are a miscellaneous category
    Other digits don’t obey strict system.

Initially KUMZ was oriented on aluminium products for aviation that is why we produce alloys of 2000 series (which strength is comparable to steel), 6000 series (which is easy to machine), 7000 series (which has the highest strengths of any aluminium alloy), and also 5000 series for marine use.

Here the list of wrought aluminium alloys in commercial production at KUMZ:
2007, 2014, 2017A, 2024, 2030, 2124, 5052, 5083, 5086, 5754, 6005, 6061, 6082, 7050, 7075, 7175