buy some 1070
sell the scrap springs to the scrap yard
Lawn mower blades used to be AISI 1070, quenched in molten salt to about a Rockwell C 40 hardness. Would be a good spring steel.
Them was the old days. Now, at least for the US, lawnmower blades are 10B35, makes a tougher blade but not such a good spring.
Whatever the steel, if you FORGE it to shape you MUST MUST ANNEAL or NORMALIZE it before hardening tempering. This is necessary to refine the grain size, which grew to Lord knows what size here & there during forging. For a few shots it does not matter, But if you want your forged anything to work a long time & be tough, you gotta heat it maybe 1500 - 1650F and air cool (that is "normalizing", the normal way to cool something, just let it cool in air). Or, for higher carbon steels one must anneal. Fine grained metal always works better than coarse grained (you gas turbine blade guys of course look at it differently)
Perhaps I spoke to strongly. "MUST" doesn't really come in to it, unless you want the thing to perform the best it can.
Text Book Metallurgy that works.