Hey everyone, I've searched the heat treating thread for about 20 mins now and i'm having a hard time finding info on the proper heat treat for s7 hot punches. I made a slitting chisel a few weeks back out of 3/4 s7 round stock. I like the look of the curved working end, so that's how i forged it. I normalized it twice and heated the steel to a brightish orange and let it air cool. Drew a dark straw temper for the working end. It worked great for a few minutes then snap, the chisel broke right in the center. (it was about 6 inches long). Any tips for the heat treatment of s7 would be much appreciated.