Relevance of ROT control for hot rolled low carbon steels

The need for precision in controlling coiling temperature and cooling profi les on the run out table for hot rolled low carbon steel strips has been in vestigated. It is claimed in literature that a high degree of automation an d control of the run out table is required to control the yield strength va riation to within 20 MPa. However, calculations based on models available i n literature predict that the Variation in strip temperature encountered in a typical run out table does not affect the mechanical property significan tly. This has been shown to be true even from experimental data available i n literature. Hence even a coarse control over the run out table is adequat e to achieve the desired yield strength. A detailed report concentrating on the influence of coiling temperature on the mechanical properties of HSLA steels is under preparation.