What is cold working the material?
Cold working is defined as, altering the shape or size of a metal by plastic deformation. Processes include rolling, drawing, pressing, spinning, extruding and heading, it is carried out below the recrystallisation point usually at room temperature. Hardness and tensile strength are increased with the degree of cold work. So by rolling each protective hoop at room temperature we are raising the tensile strength of the steel.
