A wooden door would work well for your needs. For a crematorium, not so much. A typical crematorium oven is three to four times that as a human body needs between between 1400 and 1800 to cremate a human body. One might think a crematorium could cremate several bodies at a time but they would be wrong.
I have an earthen oven with a wood door.
How many thousand degrees does it get to?
Well I’m not incinerating corpses so probably .5k max.
A wooden door would work well for your needs. For a crematorium, not so much. A typical crematorium oven is three to four times that as a human body needs between between 1400 and 1800 to cremate a human body. One might think a crematorium could cremate several bodies at a time but they would be wrong.