In recent publications, prof. Sindo Kou has proposed an approach to evaluate susceptibility to solidification cracking; this approach is based on a similar approach where a quantity, lim f s → → 1 ∂ ∂ T ∂ ∂ f S ( 1 / 2 ) , which has the dimensions of a temperature is proposed as an index of the cracking susceptibility. Again one could exploit Scheil based solidification curves to link this index to the slope of the (Scheil) solidification curve: ∂ ∂ T ∂ ∂ f s ( 1 / 2 ) = ∂T/(∂(fS)^1/2)= ∂T/(∂(fS)*(∂(fS)^1/2)/∂(fS))= (1/2)∂T/∂(fS)*(fS)^1/2= ∂ ∂ T ∂ ∂ f s ∗ ∗ f s ( 1 / 2 ) / 2