15n20 heat treat

[Deweyknives]

Anybody have HT temps for 15N20?? Can't find a thing!! I don't see it used much on its own, any reason??

 

[mete]

Our own Dan Gray sells it so ask him !

 

[markv]

Koyote uses 15n20
buzz

 

[Deweyknives]

Found some info...............

Thanks.

 

[jll346]

From Dan Grays site:

instrutions and working heats, heat treating is done mostly like O1 would be.
Annealing ,1400-1450F, hold it there for a few minutes then put into ashes or vermiculite so the cooling rate is slowed
Forging 1800-2000F,
Hardening ,1450-1550F
Heat to just above Non-magnetic 1550 F for at least 5 - 10 minutes,
quench in oil and immediately, temper at 350 to 400F for at least 1 hour
depending on the use of the blade

 

[koyote]

Pretty much what's written- no preheat is needed. I temper at 375 for an hour before vinegar soak and twice more after. I usually do a differential temper after.

I have far better results with vermiculite than ashes.

If yer working on the cheap, use canola oil or safflower oil, don't bother with motor oil and brine quenching. I have more consistent results with canola oil, but that's another thread.

See also recent threads on interrupted quenching and "waht would you ask kevin"

 

[Deweyknives]

Thanks guys. Found the info on Dans site thru Google after repeated searches here. My freeby H/T book does'nt even mention it!!

Using Evenheat and quench oil so I'm good to go. Steel was tested ,also. :thumbup: Just could'nt find temps. ['till after I asked!!:foot:]

Thanks again!!

 

[Rob!]

Here's one I figured out the hard way.

http://www.bladeforums.com/forums/showthread.php?t=450609&highlight=15n20

I did find out months later from the saw filer at the mill that the blades are 15N20.

Rob!

 

[Deweyknives]

Thanks for the link,Rob. I remember that thread now. I have a bunch of 12" wide bandsaw blade & 52" circular blade,all tested as 15n20. Circular blade is 5/32, messing w/ some fixed blades. Do anything w/ yours? Any 'new findings'?

 

[raptorvan]

Is there a guide or anything that gives the various tempering and HT temps and weld temps and demagnitizing temp of the different alloys and steels? Like a book even?

Thanks guys

 

[Stacy E. Apelt - Bladesmith]

Yes, it is a great big tome called "Heat Treater's Guide" by the ASM. It has tons of info, charts, numbers, etc. Not cheap, but worth it.

 

[jll346]

That book is $300!! Good lord thats up there with college text books

 

[Salem Straub]

This is helpful, if not exhaustive.
http://www.secowarwick.com/en/solutions/heat-treating-data-book/

 

[Birch River blades]

I don't know the exact temps that a book may tell you, but I've made a lot of knives from 15n20 by heating to nonmag for a few minutes and then quench in old motor oil and temper at 400 degrees twice for a hour each time. Comes out great. buddy of mine did and Rockwell test on 5 pieces and they all came 58-60.

 

[samuraistuart]

A thread from 2013? Originally from 2008? Talk about resurrection. I would get a PM from a mod in a nano second if I tried that.

 

[Esav Benyamin]

Why? It is valid info that new members need.

I generally object only to resurrecting argumentative discussions, not technical information.

 

[Salolan]

Why? It is valid info that new members need.

I generally object only to resurrecting argumentative discussions, not technical information.

Except for the fact that it is information that any of the experienced makers here would advise highly against.

Chris

 

[Stacy E. Apelt - Bladesmith]

I am closing this. Birch River has resurrected several old threads.

Birch River blades,
Try and look at the date of the original thread and the date of the last post. Resurrecting old threads is called necro-posting. Unless there is some real reason to bring the old thread back, post a new thread. You can link the older one in the question you ask.