Anyone take in consideration that this old steel might be better than the new stuff. I bet those tiller tines I'm using now are virgin steel. Most modern steel is made from scrap and old steel. I've got to admit I am addicted to using old rusty steel. Every knife I make I hand forge. During the hand forging process you get to know the steel pretty good. After a few hundred knives you can tell if you have good steel or not. I've got to admit this is the first time I have ever run into O-1 that has come to me as mystery steel. The first blade I forged I could tell it was good steel. As for the first blade I did what I normally do when I'm working with steel I have questions about. I'll normalize 3 times. When I go to harden the blade I'll start at 1500 degrees and quench in slow oil. I tempered at 400 degrees for 1 hour twice. This was before I knew it was O-1. If the slow oil doesn't work I'll try fast. Last resort is water.
I got 3 racks of 1932 Studebaker leaf spring a few months ago. First thing that popped in to my mind was 9260. Had my fingers crossed that it was. 9260 oil hardens. The test blade I made I quenched in oil. Didn't harden at all. Got me thinking that this car was made in the Depression years and most likely they used a much cheaper spring steel. I wasn't able to harden this first blade even in water. Still more testing to do with that steel.