How low in carbon were those scythes & coach springs. It would seem a low carbon steel would not be very satisfactory for either purpose. It would seem a man with a low carbon scythe would spend far more time sharpening than scything while a low carbon coach spring would more likely just lose its arc rather than break. o et ansping at all it would have to be very thick & heavy for its purpose.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra