AEB-L HT information

[Nylunds knives]

Hello!

I'm about to heat treat some aeb-l blades but can't find any HT information about aeb-l.

Do anybody here know how to HT aeb-l?



Regards Jakob

 

[Johnny Warner]

What hardness are you trying to achieve on an RC scale. I have the data. Heat treat it like 440C and it does very good and responds well to a cryogenic cooling between initial heat and tempering.

 

[mete]

From Uddeholm - 1870 F hardening [10 minutes] oil quench
Temper - 212 F - 63 HRc
392 F 60
572 F 57

 

[Nylunds knives]

I was trying to achieve about 59 Hrc.

I don't have the opportunity to cryogenic cooling I'm afraid.


I found this about aeb-l and 440C: http://ajh-knives.com/metals.html#metal10

It says that it's air hardening as well as oil hardening. Wich is better and should cryogenic cooling be used when air cooling?



Regards Jakob

 

[Johnny Warner]

1.Bring metal up to 1080C (hold for 5-10 minutes) and either air or oil quench. (oil is recommended with thicker pices). 2. -60C subzero treat, then temper at 200c for two hours for a 59-61 HRC. Repeat step 2 for a double temper. The graph from Uddeholm shows at 200C to be 60RC and 300C shows a HRC of 57. Hope this helps. This was taken from their HT data sheet and their telephone number is shown as: +46-563 513 00. Hope this helps.

IF you have dry ice and acetone, then this will suffice for the cyrogenic cooling between initial quench and tempering.

 

[Nylunds knives]

Thank you "mete" and "akoklat"!

The blades are 3,5mm thick so air quench should be fine I guess.

I don't have any dry ice I'm afaraid but if I aim for about 61 Hrc with the colling treatment, shouldn't I the get about 59 without the cooling?


Many thanks!



Jakob

 

[Johnny Warner]

Thank you "mete" and "akoklat"!

The blades are 3,5mm thick so air quench should be fine I guess.

I don't have any dry ice I'm afaraid but if I aim for about 61 Hrc with the colling treatment, shouldn't I the get about 59 without the cooling?


Many thanks!



Jakob

In theory yes, However, I have achieved great success with AEB-L with HRC 61-57. At HRC 57 it is tougher. My son used a double edge fighter with a 6" blade from 1/8" stock and tempered to HRC of 57 while deployed to Thailand. He skinned rats, snakes and cracked coconuts with it, the knife held up. go figure!