Hardenability of Steels

In this video we cover the theory and procedures for the Hardenability of Steels Lab or the Jominy Test Lab. The purpose is to produce hardenability curves for different steel alloys, and to see the effects of cooling at different rates on the hardness.

[@realmetallurgist8493]

Very few people understand the meaning of "hardenability". This provides a very good explanation.

[@JaredAF]

Awesome presentation

[@juancarlossanchezveana1812]

Excelente explicación

[@JustAnotherAlchemist]

Good vid, though I would have loved to see you actually complete all the tests and produce an actual curve.

[@misaelmtz8]

Noted. I usually leave that part for my students in the lab to do.

[@JustAnotherAlchemist]

@@misaelmtz8 Kinda figured that was the deal. Would be silly to ask a question, then answer it. Opens the door for easy cheating and so on. So, yeah... makes sense.

[@mahbriggs]

There are charts published by steel manufacturers.

[@THEVARIENCHANNEL]

Thanks... Good Share.

[@georgesheffield1580]

Many people mistake hardness for shear stregth or tensil strength or modulus of elasticity.

[@bgd73]

that is where specs of material before playing with it are useful. The dimensions, kpsi and ingredients.

[@northernmetalworker]

It's likely because a hardened and tempered steel tends to have higher hardness to go along with other material properties, when compared to normalized or annealed metals.

[@1crazypj]

Thanks, I never knew how the tests were done before seeing this video.
It's actually very simple set up for the quench, but I'll bet the other equipment needed is 'quite expensive'?
Still very interesting though.

[@judas611]

Thanks a lot for the content provided.
Does this mean you would have to redo the process over and over again, in order to make the entire piece of steel achieve the same hardability or is this process only done in order to understand the affect of the cooling on the crystal structure of the metal and why you would want to cool down the entire object in steel production for a stronger material?

[@misaelmtz8]

This process is done to understand the cooling rate effects. For all of it to have the same hardness you would quench it.
For some applications you want a harder steel like for certain parts of a machine or construction. Applications vary a lot.

[@aaronescorza3634]

wich is the article where I can find the grain size simulation, min 3:10, please?

[@misaelmtz8]

This image came from this source:
en.m.wikipedia.org/wiki/Grain_growth

[@ChrisS-ep5qy]

Nice

[@oiltube-tl2li]

good!

[@Sugarkraft]

Find a different narrator.

[@DavidHuber63]

That doesn't sound nice, Brother 🙏🏼