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Will Parks AAA work to quench O1, 1084, and Pop's In House 8670?


Jacob Barlow
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Hi all.  First post here, but been reading and learning for a bit.  I am waiting for my Evenheat KH418 to arrive.  In the meantime, I am looking to buy some quench oil.  I can't seem to get a definitive answer is Parks AAA would be suitable for the 3 above mentioned steels?  These are the 3 that I work with the most often.

 

Thanks for any help and insight you guys can provide.

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It will work fine with O1 and 8670 but you may not get full hardness on 1084, especially with thick cross sections. 

 

1084 is sorta in between medium and fast oil quench, where medium does fine for thin sections and fast is the go to for thicker sections. 

 

In other words, you may end up with auto hamons with thick blades and medium speed oils.

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AAA is perfect for O1, 5160, and 8670, and I've never had any problems with it using 1084 at 1/4" thick.  It has enough manganese to through-harden.  The only steels AAA might be less than optimal for are 1095 and W1/W2, or Aldo's low-Mn 1075.  It will work, but won't do a vibrant hamon.

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Absolutely.  Just be sure the oil is warm.  Parks/Heatbath specify it must be at least 100 degrees F to work.  Max allowable temperature is 180 degrees F.  It is rated as an 11-second oil at 100 degrees, and a 9-second oil at 180 degrees.  Don't worry about what the "seconds" mean, they don't correspond to actual time in the quench.

For comparison, 130-degree canola is a 9-second oil.  Parks 50 is a 7-second oil.  

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Gotcha, I'll be sure to warm it up to 100 degrees F.  Was going to use an electric charcoal starter to warm it up and use a turkey fryer thermometer to check temp if that is an acceptable method.

 

Yea I read about the "9 second oil etc..." and how it relates to a nickel ball quench, so they have a uniform comparison across all those mediums.

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