about swords, iron/steel and some physics

[XorX]

Connolly wrote about personally witnessing a 2000 year-old sword dredged from Lake Neuchatel that could be "bent almost double and then flex back" (Greece and Rome at War, p.115). The best book on this subject is probably Pleiner's The Celtic Sword.

and how many of the blades from that place don`t flex?...

there were always some extraordinary pieces, but not in mass