No, I haven't tried melting it yet. Really don't need to, I make my cast bullets from straight wheel weights.
I double checked and on the back it's clearly stamped, "pouring temperature 900 degrees F.
Guess I don't know what the heck it is now.
Maybe it's what they call babbitt. Stuff they use for bearings on some of the older slow moving equipment where they would use pillow block bearings, like field rollers, saw mills, etc.!
Can't scratch it with my fingernail, can shave it with a pocket knife!