A week or so ago i posted pics of a sword i made out of c1045 and quenched it in the gunters super quench. I had a cutting from the same piece of steel, i ground it down to the same thickness as the blade when i had quenched it. I then nomalized the blade, clayed it like the katana and quenched it. the only difference was the amount of clay i used. It was a little thinner on the cutting, than the katana blade. The place where i work has a rockwell tester and they tested it for me, the numbers are rc60 on the edge and the clay part on the spine was rc54. On the katana i did i suspect the number on the clay coating was lower because the clay was thicker. I forgot to mention after the quench i tempered the blades for half an hour at 350 f .