The toughness (drawability) of the steel wire material should be high enough for a high output. Steel with a high cleanless will restrict problems during drawing and the heat treatment. In this study, the steel wires failures occurred during production or service have been investigated. The experimental data has been obtained in the studies starting from 1994 until present at the wire drawing companies located in Kocaeli area, Turkey. Kocaeli is the most industrialized area in northwest side of Turkey. One hundred and twenty-one failure case which have been investigated in our research center were involved in the study. The results and discussion of these failure cases are presented. (c) 2005 Elsevier B.V. All rights reserved.