[TheForge] Mystery steel

[Ron Childers]

Gentlemen & ladies,

I picked up a piece of steel from my junk pile yesterday to make a tire iron
for a walk behind tiller. I thought it was mild steel- it is about 3/4"
wide, 1/8" thick abt 18" long. It has a 1/2" sq hole in one end. It is
extremely hard to bend and resisted a 36 grit grinding belt, barely knocking
the rust off. The sparks are a bright red, no sparkles @ the end and only 3
or 4" long. Wrought has longer sparks and I know it isn't cast iron. 

Does any one have any ideas or speculation on what it is? I have no idea as
to its origin, but I think it would make a good blade.

Thanx, 

Ron C