this post was submitted on 09 Oct 2025
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You can use stone or concrete for hearths so is steel really going to be that bad?
I made mine out of bismuth, really eyecatching.
If it's conducting a lot of heat and a kid sits on it they could get hurt. But I think most of a fireplace's heat travels upward in the rising gases. IANASOE
(I am not a scientist or engineer)
Wood stoves have something called a baffle plate that redirects hot air so that it flows along the interior top of the unit before leaving through the chimney. The purpose is to heat the metal enough for radiation tranferrance. I often put a ceramic-coated cast iron kettle on top, and it will boil if left for a while. Anyone who sits on the stove would have a very bad time.
Built in fireplaces work differently but aren't typically sit-onable.
Depends on what you are trying to achieve
https://askanydifference.com/difference-between-specific-heat-and-thermal-conductivity-with-table/
You want to fry an egg, go for it. You want to set a decorative candle on it.... Maybe not.
Lots of people have steel hearths and not many of those people fry an egg on them.
If you're getting it hot enough to do that you have issues and you'd probably crack the concrete or stone at the point.