I don't know the real practical importance of this, but this [1] Wikipedia page states that the Janka hardness of Black Locust is much less than half that of Ip

I don't know the real practical importance of this, but this [1] Wikipedia page states that the Janka hardness of Black Locust is much less than half that of Ipe. 1. https://en.wikipedia.org/wiki/Janka_hardness_test https://en.wikipedia.org/wiki/Janka_hardness_test