Copper saute pan metal lining is melting? So, I tried using a copper (I bought 2nd hand recently) pan to brown some beef. The lining is melting and bubbling.

Am I not supposed to use it for this?

Or has it been lined with something other than tin?

Thanks,

I am worried to eat from it now.
You overheated it, tin melts at 450 F . It may have a few per-cent of other metals in the tin that would raise the melt temperature slightly.It should be fine now except if the surface is now rough ,it will be difficult to clean. The tin can be remelted and smoothed. Unfortunately that requires some skill/experience. I have retinned at least one, I added some pure tin (not commonly available- no solder is pure tin.). I managed to get an OK result, not as good as the original very smooth surface.