Spring material?

Texas Knifemakers supply has a work hardened stainless in a couple sizes for springs, it can be bent and doesn't need heat treating. I have also made many auto springs out of 15N20 as tempered, cut, grind, bend and polish with no heat treat. Most any carbon steel will work so long as you give it a spring temper, I've even made them out of damascus with no problems.
 
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