Steel liners question

[gull wing]

LINER LOCK:
Plan to use 410 SS for liners. I've always used titanium in the past.
1. Do you harden first, before drilling, slicing, bending.
2. Do you do the above before hardning.......note 410 is quite soft and can get out of "flat"

 

[Frank Niro]

Well let me say this: you will need to get the hardness about 45 RC (Iguesstimake) . Carbide drill bits and carbide taps may be needed to drill and tap the holes if you harden before hand. Frank

 

[tedinatl]

Is there a way to get 410 or 416 to 45 RC? I haven't seen any recipes for spring tempering 410.

 

[Frank Niro]

I know you can change 416, but I don't know by how much. I do know using either 410 or 416 without further hardness would be a fruitless effort for a liner lock spring. Titanium is still the way to go. If you only need a small piece for one knife you can go to Alpha Knife Supply. Frank

 

[gull wing]

* Question not answered......... but now I do know:

1. Harden 410 steel @ 1800 deg for 5 min. Temper @ 750 deg, for two hours, two times. You shoot for 45 to 38 RC.
2. I did my own testing, expecting to fail.
I hardened 410 too the above formula and I think I can handle it by hardening FIRST.
^ It gives a "ring" when you drop it on marble (like a blade)
^ Drills ok (with carbide bits), Taps ok.
^I sliced and bent it without a problem. The lock lug holds it's "spring".
3. Think I can do this with the thinner sheets.


I love titanium, only thing used for many years. The price has gone to the next galaxy.