O1 or 1084 ...can't remember

[flatblackcapo]

Well , I ground a blade and let it sit. Now I can't remember if it is O1 or 1084. Does anyone have a suggestion of what I should do as far as heat treat?

 

[KnuckleDownKnives]

The heat treats are very close, I'd say heat to 1500*, soak it at temp for 10 mins and quench.

 

[samuraistuart]

I would do 1500F, 10 minute soak, quench in medium or fast oil. Start tempers low, maybe 350F, walk up from there. If you have some 1084 or O1 (or both) left over, you can try using your micrometer to compare thickness. Understood your ground blade may be a tad thinner than the stock you started from, but it's worth a shot. KnuckledownKnives and I posted simultaneously!

 

[JTknives]

From my testing O1 in the annealed state has sparks that are very orange.

 

[DevinT]

Yeah, O1 has darker spark pattern.

Hoss

 

[Stacy E. Apelt - Bladesmith]

Take a known piece of each and the unknown blade. Dip all in FC. It should be instantly apparent which is which after a short etch.

 

[Kentucky]

grind it, 01 produces a orange spark

 

[JTknives]

grind it, 01 produces a orange spark

Hey I slkready said that lol, but I got pictures lol. It does not show the orange as well but there are very little burst in the streamers. 1084 should have a much brighter spark with much greater bursts.

 

[flatblackcapo]

Thanks guy's! I will let ya know what I figure out.

 

[flatblackcapo]

With little measuring and a quick spark test, I have determined, thanks to you guys, that it is O1.
Here is a pic of the knife in question, because threads are better with pics. Thanks guys.

 

[JTknives]

Wait it says O1 right on the knife. No need for the testing

 

[Stacy E. Apelt - Bladesmith]

HINT:
Mark your blades with a white metal marker ( AKA paint marker) .... on both sides of the tang. It will survive HT and can still be read clearly.

 

[JTknives]

I have used steel stamps in the past when I'm concerned about loosing track.