Metal bar? Sorry...you're on the wrong forum. You want TalkXylophonealways? I though, for example, roundcores were more flexible but had the same tension as a hexcore of the same gauge
Someone here said one time to explain that: "if you put a metal bar as a string its less flexible and have zero tension"
I don't pretend to understand the science. Maybe someone who does can explain it to you better than I ever could. All I know is that the SB nickels are lower tension and more flexible than most nickel rounds I've tried.
