Glenn Gilmore Posted February 24, 2012 Share Posted February 24, 2012 Does anyone have experience using Soybean oil for heat treating hammers and punches? Quote Link to comment Share on other sites More sharing options...
pkrankow Posted February 24, 2012 Share Posted February 24, 2012 I use canola oil on punches and small parts. I haven't needed to heat treat a big part yet. Other people use peanut oil or other vegetable oils so I am sure that soy will work fine. Generally speaking you want a gallon of oil per pound of steel, and you want the oil warm to start with, and a lid in case of flame. Soybean oil has a higher smoke point than peanut oil. (soy 495F, peanut 437F) Phil Quote Link to comment Share on other sites More sharing options...
MattBower Posted February 24, 2012 Share Posted February 24, 2012 I'm pretty confident it'll work fine. If anything it may be faster than 4140 requires. However, I have no experience using soybean oil as a quenchant for anything. Quote Link to comment Share on other sites More sharing options...
rthibeau Posted February 24, 2012 Share Posted February 24, 2012 I use peanut oil in a 7 gallon metal barrel with lid for anything needing an oil quench. Soy oil should work just fine. During the colder months, I put the barrel on top of the woodstove to heat up. On Summer's Day, no need to prewarm it. Quote Link to comment Share on other sites More sharing options...
gearhartironwerks Posted February 29, 2012 Share Posted February 29, 2012 I think the problem is that the soybean oil will probably become rancid over time. I like atf 4:1 with diesel to cut the flash. JE Quote Link to comment Share on other sites More sharing options...
Nick Rossi Posted February 29, 2012 Share Posted February 29, 2012 From the horses mouth;http://www.crucible.com/eselector/prodbyapp/carbon/maxtool.html The soybean oil is OK, so long as the parts are not too small or complex. ATF would be a safer option if they are. Cheers, Nick Quote Link to comment Share on other sites More sharing options...
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