Ga. Detoledo et al., INFLUENCE OF SULFUR AND MN S RATIO ON THE HOT DUCTILITY OF STEELS DURING CONTINUOUS-CASTING/, Steel research, 64(6), 1993, pp. 292-299
The influence of S and (Mn/S) on the crack susceptibility of continuou
s casting steels was studied. It is theoretically demonstrated that th
ere is a critical value of the (Mn/S) ratio, (Mn/S)c, under which a hi
gh susceptibility to cracking, during casting or deformation of as-cas
t material, is expected. The value of (Mn/S)c increases as the S conte
nt of the steel decreases. Based on literature data and results from r
olling continuous casting billets the following experimental equation
has been found: (Mn/S)c = 1.345 . S-0.7934. A high similarity between
this experimental equation and the theoretical one is achieved. A comp
arison between the equation found and previous expressions from litera
ture was carried out. The MSC index as the ratio between the (Mn/S) ra
tio of a steel and the corresponding critical one was defined. The MSC
index is a useful tool for the analysis of experimental results from
literature.