Two different kinds of elongation can be distinguished. Constructional elongation of cable and material elongation which is specific to the material used in the manufacturing process.
After the manufacturing process of the ropes and strands, small gaps remain between each wire within the strands and between each strands in the rope. When the rope is tensioned, the wires and the strands move closer to each other, and reach their optimum position. As result of this process is, that the rope elongates to a certain extent. This constructional elongation is not the same in every rope construction. It depends on lay, lay length, rope construction and other factors.
This elongation concerns the material that the single wires are made of. It occurs, when the wire is tensioned. The material elongation is proportional to the applied load. Under normal circumstances the rope will almost regain its original length as soon as the load is removed.