Thanks Guys, nice to be back!
Dave Elliott <What about the brass/ bronze spring material used for making the arms on electrical contactors? or is it all solid state these days?>
I must admit I was thinking more in terms of springs for use in instrumentation or gizmos & gadgets in general, but as you rightly point out, electrical switchgear contactors would require similar 'spring' properties and, who knows, reeds made from such material might just have that extra little spark! ;-}
Afterthought.... electrical grade material might also contain a lower level of impurities and possibly be less susceptible to fatigue ??