If you know a blacksmith or knife maker in your area, those spring leaves can be repurposed into various smithing projects. The metal is annealed to soften it, forged into various types of projects, then retempered to whatever hardness the smith wants. Gunsmiths who make traditional muzzleloading rifle barrels by forge-welding them into a tube and rifling say that one of the best barrel-making materials for long flintlock rifles was a main spring leaf for a Ford Model A.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!