Mandalorian Steel
From Ewokpedia
Mandalorian Steel is created from Mandalorian Iron, Mandalorian Pig Iron, Mandalorian Tin, coal, and flux. It is stronger than Mandalorian Iron, but not as strong as Mandalorian Adamantine.
It is important to distinguish this alloy from the stern expression used by a popular yet vapid Mandalorian supermodel. No womp rats are harmed in the forging of this steel.