Author Topic: Yes Cast Iron Can Crack During Seasoning  (Read 1588 times)

Offline Russell Ware

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Yes Cast Iron Can Crack During Seasoning
« on: September 08, 2018, 11:58:09 AM »
The example I have here is a BSR Cornbread Skillet. It is a “Made In USA” version of the wedge pan, not the earlier “Pat. Pending” version. It was intact and in great condition from when I found it, all the way through lye cleaning and electrolysis. There were no defects as I wiped the first coat of oil from the piece and placed it into a 490F oven for an hour. But when I pulled it out of the oven, there was now a very obvious crack in one of the sidewalls. Not trying to over-analyze the situation too much, the attached photo shows the crack. Notice that this crack occurred where one of the thin sidewalls meets the thickest part of the piece, the handle. Before you ask, yes, this piece was preheated to 250F before the oil was applied. So it wasn’t like I threw a cold piece of iron into a real hot oven. Clearly the difference in thermal expansion between the thinnest and thickest parts of the pan was still enough to cause this failure. Perhaps it would not have happened if the thinner sidewalls would have been designed and rotated to meet the outer edges only, instead of where the thicker handle attaches to the outer wall. There is no guarantee that the same thing will happen to your pan when seasoning. I have seasoned several of these pans previously without any damage occurring at 490F. But I would recommend being cautious with this style pan, seasoning it at a lower temperature range between 350 and 400F.
The Lodge wedge pan has sidewalls that are much thicker than the BSR pan. Plus the Lodge pan has a hole in the center. The Lodge design creates a smaller wedge. So one can bake larger scones when using the BSR pan. The cracked pan will still bake many scones. It would just be a bit more comforting if the pan was still intact.

Offline Lewis Downey

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Re: Yes Cast Iron Can Crack During Seasoning
« Reply #1 on: September 18, 2018, 09:14:46 PM »
I hate it when that happens.

I've discovered a small number cracks during seasoning but usually figured that I missed them during cleaning. Maybe that was not the case. Thanks! On the other hand, I do not remember finding a crack in a cornbread/wedge pan. One crack occurred when I opted to shortcut the pre-heating process using the stovetop. Apparently not a bright approach.

It does not make sense to me that unseasoned iron needs to be pre-heated. Why can't a room temperature pan be put into a room temperature oven and heated to 500°F? It's not like the seasoning holds the pan together (is it?). In day to day use I pre-heat pans to whatever temperature the dish calls for.  When cooking I do not pre-heat to 250°F  then increase to the final temperature, and have never cracked a pan .

« Last Edit: September 18, 2018, 09:29:02 PM by Lewisland »

Offline Russell Ware

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Re: Yes Cast Iron Can Crack During Seasoning
« Reply #2 on: September 18, 2018, 11:02:10 PM »
Some of it has to do with the variability in brands and models of ovens themselves. Some just heat quicker than others. I believe the design of this pan coupled with my oven's tendencies lead to the crack event.

Offline Lewis Downey

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Re: Yes Cast Iron Can Crack During Seasoning
« Reply #3 on: September 18, 2018, 11:13:40 PM »
but... it's cast iron!!!

500°F or 600°F should be nothing to cast iron.

Does anyone preheat their pans in steps in everyday cooking?  Somewhat related, people commonly put recently washed pans on the stovetop to complete the drying process, so it seems unlikely to be a moisture-related thing.


I just don't understand why there is a need to pre-heat in steps. In day-to-day cooking, honestly I don't hesitate to put cold cast iron in an already hot oven. Normally I put cold cast iron in a cold oven, but when the situation requires, the pan goes in the oven.

Offline Dwayne Henson

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Re: Yes Cast Iron Can Crack During Seasoning
« Reply #4 on: September 19, 2018, 06:49:03 AM »
That's wild Russell,  I put "cold" well room temp cast iron in a hot oven all the time. At the camp oven cookout we had hot coals that are just poured onto the lids, or with camping the skillet is placed over the fire. That is odd though it happened in a controlled heat enviorment, compared to the uneven heat of charcoal and or fire.
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Offline Tom Reisdorf

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Re: Yes Cast Iron Can Crack During Seasoning
« Reply #5 on: September 19, 2018, 09:04:45 AM »
I always attributed a crack showing up during seasoning as something I missed and then was highlighted by the Pam spray settling in the crack not baking out, showing a darker line. An oh crap moment. Fortunately I have very little experience with this.

Offline Valerie Johnson

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Re: Yes Cast Iron Can Crack During Seasoning
« Reply #6 on: September 29, 2018, 06:52:28 AM »
The process of repeated heating and cooling causes stress on metals,ceramics and glass and it does not have to happen immediately, It can happen after the item has cooled down.
I had a set of glass fireplace doors that one panel shattered in the middle of the night in the middle of the summer...there was no fire/heat on them and we were in bed and heard a strange noise and got up to find the glass in one panel had just shattered, Car windows can shatter the same way.
I have had stainless steel pots with the rolled rim have the rim crack while using them, heat and cool causes things to expand and contract and fail