Ukraine. The city of Zaporozhye. Open-hearth shop of the Zaporizhstal plant. The steelmakers of the 12th open-hearth furnace are a collective of communist labor who have undertaken to produce additional, over-planned steel in each melt. Measuring the temperature in the furnace, taking a sample of steel. Steel is pouring. The blast furnaces of the 5th blast furnace, who supported the initiative of the steel makers, smelted 71 tons of additional pig iron in one shift. Stills showing the production processes of the blast-furnace and open-hearth workshops. The rolling mill is in operation.