Antifreeze for coolant

G

golfer1

Joined
Nov 24, 2016
Messages
419
I've been reading about using dry ice and alcohol or acetone to cool steel such as AEB-L during heat treat. Both fluids seem somewhat dangerous to me and I was wondering about using antifreeze. To those of you who know about theses things, what might be pros and cons of using antifreeze.
Thanks for your help.
 
Dry Ice and Denatured Alcohol(DA) isn't very dangerous unless you have it next to open flame. Antifreeze actually freezes at -36f well under the sub-zero quench recommendations of around -100f. Aside from that I would be much more concerned about the dangers of anti-freeze and its toxicity and disposal than Denatured Alcohol - which evaporates rather quickly if left open. I would not use dry ice and acetone as its harder to store and doesn't offer any real advantage over DA as it feezes at a lower temp -139f vs 173f
 
Avoid the antifreeze. Besides listed above, it is not as efficient at removing heat as the others.
 
I'd sooner use a bucket of gasoline than antifreeze in my shop...
The 4 legged assistant and antifreeze are not a good combination
 
tmickley said:
RV anti-freeze is non-toxic and cheap.
Click to expand...

RV antifreeze is either denatured ethanol (poisonous) or ethylene glycol (toxic). Denatured alcohol is denatured ETHANOL but likely more concentrated and pure than RV antifreeze (Peak brand is <24% ethanol by weight).
 
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