Stelmor® Process, Retarded Cooling

The Retarded Cooling Stelmor® Process differs from the other methods listed above in that insulated covers are used along all or part of the conveyor, greatly reducing the cooling rate through transformation. The rod is coiled to a greater depth on the cooling deck (less ring-to-ring spacing) than with the Standard Stelmor Process. This process produces low-carbon steel grades with tensile strengths from 4 to 10% less than that of the Standard Stelmor Process, resulting in greater total drawability and more residual ductility after wiredrawing.