Standing dead elm, that's well seasoned, when cut into shorter rounds a foot long or so, will split with the Fiskars suprisingly well when worked, as Woodbooga says, at the edges. Usually, one or two strikes often gets a crack started, then flip the piece and meet up with the crack on the other side. Any way you slice it, it's more work than most other woods, depending on condition of the wood. I've berated some green firs harder than dry elm, a time or two.
I've had some dry elm split like ice cubes at zero degrees....just one pop after another and the pieces fly off like you were blowing stumps or something.
Well seasoned elm cut short enough, really ain't so bad, especially if you've got a Fiskars SS and a buddy to set pieces and switch off with.
Blessings in Yeshua