- Joined
- Oct 20, 2006
- Messages
- 3
Want to harden some stainless 416 pinning material. Won't harden with propane torch. Does it require a higher temp? Maybe map gas?
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hardening 416
- Thread starter Fran Varnum
- Start date
- Joined
- Jun 17, 2001
- Messages
- 5,705
Heat it as much as you want but don't expect it to harden. There's not enough carbon to harden it.
- Joined
- Oct 20, 2006
- Messages
- 3
I guess my book by famous maker is wrong. It claims that 416 is hardenable. I believe you because I tried it, Thanks.
- Joined
- Jun 17, 2001
- Messages
- 5,705
You can work harden it a little but I just don't think you would gain much.
- Joined
- Jan 5, 2005
- Messages
- 2,531
That is interesting as 416 is listed as a martensitic stainless steel . I just pulled this off of another site
Hardening - Hardened by heating to1697-1850°F, quenching in oil, and tempering to suit the mechanical requirements. Note: The tempering range 752-1076°F should be avoided, due to poor ductility. A chart listed on the same site lists an attainable hardness of 401 HB (3000 kgf load w/10mm tungsten ball) which converts to around 43 HRC . That is tempering at the range that is "not recommended" though
427*C or 800*F . These #'s could very well be incorrect as I'm doing this in a "hurry" 
(Please don't use these until they are double checked.) I'm leaving for the day so I can't defend myself for another 10-12 hrs. 
In a nutshell..... I would be interested to hear what the "pros" have to say as I was under the impression it could be hardened by "Heat Treat" versus the "work hardening" Ray mentioned.Have a great day guys :thumbup: BTW , As Ray mentioned there is only .15% Carbon content listed in the composition
Hardening - Hardened by heating to1697-1850°F, quenching in oil, and tempering to suit the mechanical requirements. Note: The tempering range 752-1076°F should be avoided, due to poor ductility. A chart listed on the same site lists an attainable hardness of 401 HB (3000 kgf load w/10mm tungsten ball) which converts to around 43 HRC . That is tempering at the range that is "not recommended" though
427*C or 800*F . These #'s could very well be incorrect as I'm doing this in a "hurry" (Please don't use these until they are double checked.) I'm leaving for the day so I can't defend myself for another 10-12 hrs. In a nutshell..... I would be interested to hear what the "pros" have to say as I was under the impression it could be hardened by "Heat Treat" versus the "work hardening" Ray mentioned.Have a great day guys :thumbup: BTW , As Ray mentioned there is only .15% Carbon content listed in the composition