So, I just made a short test run in a basically finished game, to get the values I posted for Styg in the recent devlog thread.
I figured I'd try out some recipes, sold a bunch, bought a bunch, used Junkyard surprise a lot. Then I went to the Fixer, scrapper thugs attack me. I go there, hit one, he takes 270 damage and dies.
Turns out my Tungsten Armor spikes suddenly convey 219-379 bonus damage.
After killing both with my sledge, the bonus damage is now 259-449.