In s industrial production is more and more requierement to a saving costs. Findig savings has been removed even to the areas using safety parts, f.e. parts of car chassis. This projekct agglomerate posibilities of technology controled cooling proces of die forgings from micro alloy steel, which is right example how we can spare production expenditure. Micro alloy steel 30MNVS6 was studied within the standard production conditions. A lot of tests were made. There where change a cooling rates of proceses without delay after forging proces. One experiment was made for two temperature of forging.proces. Two series of mechanical tests was made and then was observed phenomenon of metalurgical structure changed and mechanical properties.