Tempering temperatures for 1084

D

dustfurn

Joined
Oct 2, 2007
Messages
72
Can anyone point me to a chart for 1084 tempering temps & corresponding hardness?

Also, any advice for tempering temps for a 11" chopper/camp blade made from Aldo's 1084?

Thanks for the help,
Dustin
 
In my experience, Aldo's 1084 is great stuff. What are you quenching in? It does make a substantial difference in your tempering temps. As an example, i used to quench in peanut oil heated to ~150F. A damascus blade of Aldo's 1084 and 15n20 quenched in that is ust about perfect with a 400F temper. Now that I'm using Parks #50, I get better martensite conversion and 400F leaves blades too brittle so I've bumped to 425-450F.

For a chopper, make sure you blue the spine and body of that blade (except for ~1/2" at the edge) with a torch. I do this 3-4 times and the results have been good. It will end up more durable for your effort.

-d
 
The best way to do this is turn your oven on at 325 and temper the blade. test, bump it up 25 degrees and do the same. continue until you get the results you are looking for. there is too much variance in ovens to get the identical results that someone else is getting 1500 miles away. and like i learned the hard way you might use parks 50 and i might use tough quench and we will need to temper differently. I am by no means an expert on this but i have learned that you need to test, test, test and document everything that you do. I hope this helps.
 
Three 2-hour tempers at 350 F works fantastic for Aldo Bruno's 1084.
Just the other day, my son was batoning oak logs for approx. 20 mins...no edge deformation, and still shaving hair. :thumbup:
(It probably doesn't need three tempers.)
 
Erik Fritz said:
The best way to do this is turn your oven on at 325 and temper the blade. test, bump it up 25 degrees and do the same. continue until you get the results you are looking for. there is too much variance in ovens to get the identical results that someone else is getting 1500 miles away. and like i learned the hard way you might use parks 50 and i might use tough quench and we will need to temper differently. I am by no means an expert on this but i have learned that you need to test, test, test and document everything that you do. I hope this helps.
Click to expand...

This is how I temper 1084.
 
deker said:
In my experience, Aldo's 1084 is great stuff. What are you quenching in? It does make a substantial difference in your tempering temps. As an example, i used to quench in peanut oil heated to ~150F. A damascus blade of Aldo's 1084 and 15n20 quenched in that is ust about perfect with a 400F temper. Now that I'm using Parks #50, I get better martensite conversion and 400F leaves blades too brittle so I've bumped to 425-450F.

For a chopper, make sure you blue the spine and body of that blade (except for ~1/2" at the edge) with a torch. I do this 3-4 times and the results have been good. It will end up more durable for your effort.

-d
Click to expand...

Thanks for the replies.

I'm quenching in mcmaster-carr's fast quenching oil (it's an 11-second oil, i believe).
 
dustfurn said:
Thanks for the replies.

I'm quenching in mcmaster-carr's fast quenching oil (it's an 11-second oil, i believe).
Click to expand...

Try starting with a 400F temper, and test the edge. If it chips out at all, bump up by 25F as suggested above.

-d
 
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