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  • FAQ: What is the relationship between Charpy impact energy and Charpy lateral expansion for ferritic steels?

What is the relationship between Charpy impact energy and Charpy lateral expansion for ferritic steels?

   
For full-size 10 x 10mm specimens, the relation between Charpy impact energy and Charpy lateral expansion is shown in Fig.1. for various ferritic steels.

Up to a Charpy impact energy of about 100J, the corresponding lateral expansion can be approximated by:

LE(mm) = Charpy energy (J)/100

There is a reduction of lateral expansion at high Charpy energy levels for some ferritic steels, as can be seen, so this relation should not be used beyond 100J. For higher Charpy energies, a fit to the data is given in Fig.1.

Fig.1. Charpy impact energy, J
Fig.1. Charpy impact energy, J

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