Trying to figure out if Parks #50 will work to quench 80crv2, or if I need to pick up some AAA. After reading through the forums, looks like both have been used with success.
Kevin - Iam curious to know what it does to the steel in quenching too fast... we struggle to get good oils here, you dont actually know how fast it is... some oils we have, that say they are for water quenches, but 3mm 1085 doesnt harden... so it is a bit hit and miss... distortion is one, O1 i did an experiment in water, gained a point as quenched, also warped a 2x1x0.2" piece of O1... but in the fastest oil we get, it was at least 1 hrc point lower than water and straight... any other oil and i get even lower hardness, not much, maybe 64.5 - 65 instead of 65.5-66 as quenched... this after some grain refinement. water was 66.5 and a little above on the test sample, only did it at one temp, not at the variety like the others. so i am using the fastest oil i can get for O1, and 80crv2, but is there anything else one can test or see, that will tell you the oil is too fast? - i don't notice any real brittleness, but that is difficult to quantify.