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Jay Ramirez

5160 interrupted quench

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5160 a forgiving steel... but is it forgiving enough to survive a water 3sec then oil quench ive only quenched 5160 in veggie oil. I want to see how far i can push 5160. Advise is appreciated thanks

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For what purpose? You have almost 5 seconds to get 5160 below the temp needed to fully harden the steel. Quenching in water is not going to do anything other than stress 5160 and cause stress fractures. That is the point of an interrupted quench; you are decreasing the amount of stress the steel is undergoing.

People use water as a quenchant because it is fast, and some steels need a fast quenchant. 5160 is not one of them. Heat your oil up and that will be as fast as you need it.

Edited by Wes Detrick
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What Detrick said!

 

I had to learn that one the hard way.

 

-Gabriel

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Yep, Wes is right. 5160 and water do not mix in any amount. Too much hardenability for the rate of quench.

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Ok how bout cold or room temp oil would that change anything?

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It would slow down the quench. What are you trying to achieve? If you are going for the most effective quench, which is generally what EVERYONE here goes for, then hot (about 120F) canola/veggie oil is what you want. There are several threads about quenching and quenchants that you may want to read through.

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Ok well that answered my question thanks guys

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I quenched spring steel several times in water as i was just practicing eye balling of decalescence. let me just say it was making unhealty noises everytime haha. The test broken blade also warped like a corckscrew. It was fun though!

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5160 is actually one of most forgiving steels to quench I worked with, but why would anyone use water on that is beyond me.  The preheat of oil is also not needed if you use slow oil. Many people use hydraulic, but that is opposite of what I have in mind.  I have rape oil from tesco, that is rather thick, but its exactly what you want with fast steels. 

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