Any info in IR-805 steel? 1

[Lyrl]

We sometimes heat treat IR-805 steel for a customer to a process they specify (1825°F, air blast, double temper 1130° then 1100°). I would like to learn more about it - for example, is it susceptible to cracking if there is a delay after the air blast and before the temper? (Sometimes our schedule works better if we can do the first operation Friday and do the other operations Monday morning for a Monday delivery.) Google wasn't able to return anything relevant (apparently IR-805 is a really popular letter/number combination for a lot of things that aren't steel) and I'm hoping someone here could point me in the right direction of where to look.

 

[BMet53]

What are the components you are heat treating?

This may be a long shot, but I have seen "IR" prefixed on Ingersol-Rand steel grades and material specs for rock drill / hammer tool steels. These are usually proprietary grades and / or modifications of AISI alloy steels or carburizing steels.

Again, a long shot.

Perhaps, also you customer for whom you are doing the heat treating should have some background???/

 

[Lyrl]

I think the components are pump impeller castings? - outside wall a solid cylinder or hourglass or other shape, solid cylindrical core inside, and spiral webbing in between. They come in many different diameters and heights.

 

[arunmrao]

You are discussing high chrome iron castings as per ASTM A532 / A532M - 10(2014) Standard Specification for Abrasion-Resistant Cast Irons.

These castings are hardened by fast air cooling . During this process, you may encounter cracking, if the castings have been abused , or if the chemistry is improper. I have not experienced any cracking , due to delay in tempering . The double tempering though not very common is done to reduce retained austenite levels ( < 5%).

Hope it helps.


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