Have you seen this post here on the EB forum? Something about UNS 2200 nickel?
http://www.ernieball.com/forums/showthread.php?t=12837
Maybe 'freedok' knows more about metalurgy than you really wanted to know?
http://www.ernieball.com/forums/showthread.php?t=12837
Maybe 'freedok' knows more about metalurgy than you really wanted to know?