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You can oil quench D2, as a matter of fact, it is said to reduce RA levels over plate quench. Plate quench is faster than many realize, and can be faster than a slow oil. I wouldn't use Parks 50, don't get me wrong, as that oil simulates the speed of water, close anyway. Good ole canola would work. 130F canola is said to have a ball speed of 9-11 seconds, close to medium speed oil. That would be my choice of quench oils (if I didn't have AAA or similar). Oil quench, then clamp in your steel plates if warp is problem/concern. However, if in the future more SS and high alloy tool steels will be used, the aluminum plates are a great investment.
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