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ACSR Aluminium-steel rope for overhead line Application Standards Used as uninsulated overhead line for transmission and distribution of electric power. DIN 48201 IEC 60228 Construction Technical data Aluminium-steel rope consists of one or more concentrically stranded galvanized steel wires in the centre, and concentrically stranded aluminium wires in external layers. Falkovideo part 3. Small weight of aluminium and its good conductivity are combined with high resistance to elongation of steel. Al/St ropes are made of rigid drawn aluminium wire and round galvanized steel wire. Dimensions – nominal cross-section Calculated cross-sections Construction Construction External diameter Weight Permitted stress Conductor resistance at 20 °C Permitted current Al/Fe ratio Al Fe Netto max.