The Edge Formability of High-Strength Cold-Rolled Steel

Little information is available about the influence of inclusions and edge condition on the edge formability of cold-rolled steels. For this reason, a series of high-strength cold-rolled steels was evaluated through the hole expansion test. The steels examined were a rephosphorized steel, microalloyed 50 and 60 ksi steels, and recovery annealed 60 and 70 ksi steels.