I tried to heat treat a piece of 4103 steel .125 thick 6 inches long shaped like a "u". I put the piece in the furnace at 1600 degrees for 2 hours (the oven was preheated), then oil quenched, and anealed at 700 degrees for 1 1/2 hours. The rockwell hardness I achevied was only 22 on the c scale. I would like to achive 45-50.
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