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

Charpy energy (CV)–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 CV–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, CV 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 CV with acceptable conservatism for engineering purposes. A 95% lower-bound curve equation has also been given.