Originally Posted By: Dick_dup1
The fact that there is a 'bulge' no matter how much or little means that the barrel steel has undergone 'inelastic' deformation as opposed to 'elastic deformation'. Steel can and does undergo elastic deformation and returns to original dimensions with it proerties of tensile strength unchanged.
When steel undergoes inelastic deformation, the tensile strenght decreases and may fail subsequently catastrophically.-Dick


Dick:

Thanks for that explanation.

Hack