• Pre-painting or film-lamination of sheet metal
  • Protective foliation, crosswise or lengthwise cutting, embossing of coated sheet metal
  • Wide range of colours
  • Custom coating


  • Production of alloys and master alloys of Aluminium and Copper
  • Recycling of non-ferrous metals based on Aluminium and Copper


  • Processing of hot-dip galvanized, cold-rolled and aluminium sheets
  • Crosswise and lengthwise cutting of coils
  • Custom cutting


  • Production of reinforcing window, plasterboard or welded profiles from hot-dip galvanized strips 

Střechy Comax

  • výroba profilů pro sekční vrata
  • výroba výztužných okenních, sádrokartonových a svařovaných profilů (jekly, trubky)
  • výroba speciálních profilů


    The METALLURGICAL OPERATION is engaged in manufacturing foundry alloys and master alloys of aluminium and copper and manufacturing history in Velvary dates back to the 1930s. Since 2017, the company has two production plants for aluminum processing in Germany.

    Besides the ingots casting technology, the company also uses liquid aluminium transport technology that significantly saves time and energy consumption during further processing at the customer´s end.

    The modern metallurgical laboratories are equipped with peak measuring instruments for diagnostics of chemical composion of both raw materials and finnished products, emission spectrometers, an equipment for measuring the density index as well as metallurgical microscopes. An inspection cerficate is issued for any melt.

    Alloys and master alloys are intended for use in the foundry where they produce castings especially for the automotive, engineering, electrotechnical or chemical industries.

    The output reaches 220.000 tons of products per year and the manufacturing process quality is meeting the international standards ISO 9001, ISO 14001, IATF 16949 and ISO 50001.


    The up-to-date metallurgic laboratory is equipped with top measuring instruments for diagnostics of chemical composition of non-ferrous metals, and has SPECTRO and Q8 MAGELLAN emission spectrometers, a density measurement device and a metallurgic microscope at its disposal. The inspection certificate is automatically issued to each melt.