"pltrgyst" > wrote in message
...
> On 10/31/13 12:34 PM, Helpful person wrote:
>
>>>>> Metal expands when heated. It will sort of push the sides out and
>>>>> flatten. Some pans are designed that way to allow for the expansion.
>>>>> A metallurgist can explain it better.
>>>
>>>> Rubbish.
>>> You say rubbish, yet you offer no better explanation. What does that
>>> make you? Explain or STFU
>>
>> A physicist. I cannot explain what you state without observation, but
>> your
>> explanation is incorrect.
>
> OK. I have two pans, one Griswold cast iron and one All Clad, which have
> warped -- viewed from the bottom, the cast iron is concave, and the All
> Clad is convex. Both flatten out on the cooktop after about five minutes
> of medium heat.
>
> ???

I don't think I have ever had a warped pan. And I've had a few cheap ones
that I used for various craft projects. They didn't warp either. My mom
has had plenty of warped pans. They are extremely obvious on her flat
topped stove.

The only pan I've ever had that didn't have a flat bottom was a wok. It
came with a ring to be put on the burner to make it flat. I finally got rid
if it because I don't really like stir fries and the pan wasn't getting much
use.