Alcan's ACSR/SD composite conductors are manufactured with two layers of 1350 H-19 trapezoidal shaped aluminum wires concentrically stranded around a steel core of round coated steel wires.  On certain larger conductor constructions, the trapezoidal shaped wires are surrounded by a layer of round 1350 H-19 aluminum wires.  The steel core and the two layers of trapezoidal shaped aluminum wires are separated with a gap to provide the self-damping characteristics.  Steel core wires are protected from corrosion by galvanizing, aluminizing, aluminum-clad alloy or zinc - 5% aluminum misch metal alloy coating.  Standard, Extra, High and Ultra High strength steel are also available.

Alcan's ACSR/SD cable meets or exceeds industry requirements per ASTM specification B-701.

Alcan's self-damping conductor, ACSR/SD, is designed to control aeolian vibration.  Additional advantages in using Alcan's ACSR/SD include:  shorter, more economical towers, increased reliability, lower overall line cost, reduced sag, elimination of vibration dampers, reduced ice and wind loads as well as permitting longer spans.