Heat treating 416 stainless to a spring temper?

[flatgrinder]

Anyone have a heat treat recipe for 416 stainless?

I'm making a liner lock and the lock is 0.060" thick.

Thanks! :thumbup:

 

[mete]

Harden 1700-1800 F , oil quench. temper 900 F for 42 HRc .If you need harder drop temperature but avoid 400-500 F .

 

[flatgrinder]

Thank you for the reply mete.

That's what I thought, but afterwards when I tried reseating the detent ball -the lock shattered about 3/8" lower than the ball. It broke like glass and the grain was really fine. Maybe I should have tempered it at a higher temp?

Do other makers heat treat 416 when using it for liners? Or should I leave it annealed?

Thanks!

 

[Bill Burke]

Harden 1700-1800 F , oil quench. temper 900 F for 42 HRc .If you need harder drop temperature but avoid 400-500 F .

That should be avoid 400-580 degrees Centigrade.

I have been doing a bunch of spring pocket clips for another local knife maker and my process is to heat to 1500 soak 5 min ramp to 1750hold five min then air quench. I do this by blowing cool air on the parts until i can handle with bare hands then I temper twice for one hour at 600 degrees F. I started using the air quench because I was having trouble with breakage using oil even though the springs were rockwell testing at 45 hrc.

 

[mete]

Thanks for catching that. It should be 750-1075 F !