Hey guys, not just any steel will temper and make springs, you need a high carbon content for the best springs. The raw spring stock can be purchased fro Brownells gun smithing site or catelog. For camera back type springs, you can use a propane torch for a heat source. Simply keep it moving while bringing up to non magnetic red, then bend and cool slowly, or quench it in ambient temp. water then reheat to straw to temper for a working spring.
Cooling slowly will be the same as annealing, quinching will make it too hard
and will have to be slightly tempered. Do it in a shaded area (out of bright sun light) where you can see the color changes of the steel.

Brownells spring stock is soft enough to file or cut with a jewlers or hack saw.