3. Tensile Strength
The mechanical properties of a drawn wire depends upon:-
a) The degree of reduction of area by cold working imposed on the steel during wire drawing. This is work hardening.
b) The gauge at which the wire has a intermediate heat treatment. ie annealing or softening.
c) The chemical composition of the steel employed. ie the carbon content.
It is important to ensure that the tensile strength is consistent so that it performs repetatively.