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Charpy impact energy/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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