Gray Iron Results Evaluation of IJMC Paper Titled ‘Influence of Mn and S on the Properties of Cast Iron Part III—Testing and Analysis’

This Technical Communication analyzes and evaluates the results and major conclusion drawn by the IJMC paper titled ‘Influence of Mn and S on the Properties of Cast Iron Part III—Testing and Analysis’ 1 and authored by Gundlach, R. Meyer, M. and Winardi, L. That paper concluded that the mathematical product of the manganese and sulfur contents is a more accurate predictor of the mechanical properties of gray iron than the commonly accepted ratio metrics of those two elements, but this technical communication uses the published results of the subject paper 1 to rebut its main conclusion and reassert the long held commonly accepted conclusion that the statistical significance of the ‘ratio’ metric dwarfs the statistical significance of the ‘product’ metric.