What was the pilum made of?

[M. Demetrius]

Ok, so in Europe, you use the tree commonly called ash. In the US, we have a variety of trees called ash, with different praenomenis. I guess, since there were no Romans here...??

Hickory is used quite a bit for tool handles here, so I think that might be good for short handles, anyway, but I also think it's a dead horse. Not many over here on this side of the Atlantic will import European ash, or English oak, to make their projects.