Help heat treating O1

[smitty0331]

It's been a couple years since i've made a knife, but recently I set uo shop in my garage and found some O1 I had on hand and made my first knife in a couple years. The problem is, I can't remember the hardening temp, soak time, or tempering temp. for O1. I tried running a search, and I checked the stickies, but got no definate answers. If anyone could help me out I would greatly appreciate it.

 

[tattooedfreak]

I have a bunch still wrapped and it says harden 1450-1500 f 30 min per inch thickness, oil quench (63-64 rc) temper 300 f 63-63, 400 f 61-62, 500 f 58-60, 600 f 54-56. I also found these refs... buffaloprecision.com/data_sheets/DSO1TSbpp.pdf
http://www.threeplanes.net/toolsteel.html
http://www.westyorkssteel.com/01.html
http://ajh-knives.com/metals.html

Hope it helps, good luck.

 

[Darrin Sanders]

Austenitize @ 1475 with a 10 minute soak. Quench in a slow oil. Start your temper at 400 and work up to the hardness you want.

 

[Brian Ayres]

cashenblades.com/steel/o1.html

This might help too. Look through Kevin's site. It has tons of info on heat treating and more.

 

[smitty0331]

Thanks alot guys. That should do me just fine.

 

[JMJones]

Anyone have any issues with O1 air hardening from normalizing? I was having trouble cutting with my bandsaw after normalizing, however when I let it cool by turning off the forge and letting it cool in there it was fine. This is just for rough forging, I will use my kiln for the final thermal cycling and hardening.