- operation of blast furnaces, steel converters, rolling and finishing mills

- production of pig iron and spiegeleisen in pigs, blocks or other primary forms

- production of ferro-alloys

- production of semi-finished products of iron or non-alloy steel

- production of ingots, other primary forms and semi-finished products of stainless steel or other alloy steel

- production of angles, shapes and sections of stainless steel or other alloy steel

- production of bars and rods of stainless steel or other alloy steel

- production of flat-rolled products of iron or non-alloy steel

- production of angles, shapes and sections of iron or non-alloy steel

- production of bars and rods of iron or non-alloy steel

- production of sheet piling

- production of railway track materials (unassembled rails)

- manufacture of cast-iron tubes and cast-iron or steel centrifugally cast tubes

- manufacture of cast-iron fittings: non-malleable and malleable cast-iron fittings and cast-steel fittings for which connection is obtained by screwing for threaded fittings, by contact for socket fittings or by bolting for flange fittings

- manufacture of seamless tubes, by hot rolling, hot extrusion or hot drawing, or by cold drawing or cold rolling

- manufacture of welded tubes by cold or hot forming and welding, by forming and cold drawing, or by hot forming and reducing

- manufacture of steel tube fittings:

- manufacture of steel bars or sections by cold drawing, grinding or peeling

- manufacture of open sections by progressive forming on a roll mill or folding on a press of flat-rolled products of steel

- manufacture of steel wire by cold drawing or stretching

- production of granular iron and iron powder; production of iron of exceptional purity by electrolysis or other chemical processes