In the production of rods and profiles it is assumed that continuously cast billets and extrusion billets are made with a diameter of approximately ∅ 150 to 300 mm, 200 to 800 mm long respectively. They are heated in induction or gas furnaces to an extrusion temperature, which is above the recystallization temperature. Next, the heated pins are pressed onto an extruder with the desired width. The opening of the die tool determines the shape of the rod as it leaves the press. For particularily wide diameters the rods and profiles are left in straight lengths, whereas those with a smaller diameter are coiled.
The surface of the rods and profiles are oxidized due to the high temperatures in the press. This oxidized layer is removed by pickling. Straight length rods are submerged in a pickling bath and coiled rods are continuously run through the pickling bath. All further processing of the rods is made by cold forming.
Ring materials rods are continually run through combined machines. In these machines the finishing processes are made. These, in order of operation are cut and drawing/extraction, quality control, cutting into lengths, and straightening. Straight rods and profiles are placed on long drawing benches. In many cases larger diameter rods and profiles are delivered "as is" after undergoing quality control, cutting, and straightening. Other extrusion rods and profiles are placed in straightening machines or formed to a desired shape.
Rod and profile materials are checked for imperfections as well as shape tolerance.