Hanger wires for contact wires of railway electrical lines

A hanger wire for contact wires of railway electrical lines, the hanger wire comprising:

• one or more internal strands, wherein an individual internal strand comprises:
• a first internal wire, wherein the first internal wire comprises a steel core clad with a layer of copper or a second alloy of copper;
• and
• a first set of external wires disposed around the first internal wire, wherein the first set of external wires comprise copper or a first alloy of copper;
• and
• external strands disposed around the one or more internal strands, wherein an individual external strand comprises:
• a second internal wire, wherein the second internal wire comprises copper or a first alloy of copper;
• and
• a second set of external wires disposed around the second internal wire, wherein the second set of external wires comprise a steel core clad with a layer of copper or a second alloy of copper;
• wherein in the first internal wire and the second set of external wires, the layer of copper or the second alloy of copper has a thickness greater than or equal to 3% and less than or equal to 15% with respect to an overall diameter of the first internal wire and individual ones of the second set of external wires;
• and
• wherein the first and second internal wires and the first and second set of external wires of a respective internal or external strand has a winding pitch greater than or equal to 10 times and less than or equal to 40 times with respect to an overall diameter of the respective internal or external strand.