- Joined
- Mar 17, 2024
- Messages
- 43
Wednesday I'll be receiving five 1' pieces of 1/4" diameter 1144 steel, two 1' pieces of 3/8" diameter hardened multipurpose 4140 steel and one 1' piece of 1/2" diameter high strength 4140 steel.
The advanced gunsmithing book posted in this section agrees with you that it should be hardened.I think that whatever is used it should be heat treated; 4140 HT is not all that hard, perhaps about 32 Rc, I'd be thinking of making the part out of 0-1 drill rod, it is a true tool steel, I think I'd harden and draw it to about 35 -40 Rc.
I like O1 tool steel easy to machine and you can hardened the steel.I am working on restoring a particularly trashed FIE E15 revolver and one of the parts that I can't buy is the firing pin. I don't have a lathe but I made a functional replacement using a drill press and file out of 12L14 steel as a test. Now I feel confident I can make the part so I want to get a better steel for the purpose.
I ordered some 1144 rod from McMasters and I was wondering if it would be a good choice or is there something better available.
I am extremely limited in heat treating ability as all I have is propane and oxyacetylene torches and my wife's oven.
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Didn’t Armalite win the M16 contract for being the cheapest????IIRC 17-4 is the spec for the M16.
So I just want to make sure I'm understanding this correctly. For the h900 condition you hold it at 900 degrees for 1 hour?Best thing about 17-4 ph is the insanely simple heat treating schedule.
Buy your material in condition A
Then heat at temp in chart. Let air cool.
The number in each condition in the chart is the temp you hold it at.
For H900 the time is 1 hour. All other conditions the hold time is 4 hours.
With these low temps you don't have to worry about scaling of your part.
You can also buy the material pre hardened and machine with carbide.
McMaster-Carr
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