Charpy energy-lateral expansion relations for a wide range of steels

Charpy energy (C V)-lateral expansion (LE) relations are useful in situations where a facility for measurement of LE is not available. In this note, after presenting the data for various steels in a single plot to get a global picture and discussing the dependence of the C V-LE plot on the type of steel, the data for particular classes of steels (austenitic stainless steels (SSs), AISI 403 martensitic SS, A533B steel, 9Cr-1Mo steels, etc.) are replotted in individual plots, and the mean quadratic fit to the plot is given as well as (where appropriate) the 95% confidence lower bound curve. Finally, C V normalized by yield stress has been shown to bring all the data into a single band and a quadratic fit curve equation has been derived and shown to predict LE from C V with acceptable conservatism for engineering purposes. A 95% lower-bound curve equation has also been given