Aeb-L stain resistance

JoeBusic said:
14C28N max thickness is 4mm. 420HC at rough finish has the same resistance as D6 and D6 is bad. There is an issue with hardness. Harder is more resistant. So D6 @65HRC for a weird reason resists as 420HC @57HRC. That's why I am looking at steels that can go for 60HRC. Dipping knives in oil over winter is to be avoided. I want them clean in the spring just as when stored.
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Thats interesting. My gut tells me heat-treated 420HC should always be more rust resistant then D6 no matter the hardness, but I am unsure of that.

After HT and dry ice bath I am hitting 61-62 HRC with 1.4034 from Eurotechni (1060°). I temper down to 60-61 HRC at 180°.

Here another good article on rust resistance of D2 and how not the initial chromium content, but the content of chromium in the solution affect the rust resistance (Google title + Knifesteelnerds):
How Much More Chromium Does D2 Need to be Stainless
 
FredyCro said:
Thats interesting. My gut tells me heat-treated 420HC should always be more rust resistant then D6 no matter the hardness, but I am unsure of that.

After HT and dry ice bath I am hitting 61-62 HRC with 1.4034 from Eurotechni (1060°).
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Didn't know it can go that high. I'll push it higher and check again. Below is what happened. With and without flash. The thrower is 420HC. Others are D6. On the small one there is a part with remainder of electro etching for corrosion resistance. It served the purpose but weakened the steel as electricity creaps in and creates massive amount of crack propagation sites. I have abandoned the idea. Cerakote for non SS is still the best solution.
As seen 420HC is bad. Difference in corrosion is related to surface condition. Darker parts are from ungrounded 240 grit. Rest is 320 grit and D6 is used up 120 grit. This is now 4 days from the incident.
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Definitely use knifesteelnerds.com as a reference regarding corrosion, and the theoretical "why" behind it.

Larrin certainly aims to tell the truth based in science and/or actual controlled experimentation. When you can back theory with practice, it's potent.
 
Just checked the prices of LC200N in US. Holly bananas, that's high. In EU is half the price in retail and quarter buying direct from Bohler.
 
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