Originally Posted by
PlanoFuji
The bluish coloration means that if the tubing was harden and tempered (which it may not have been then the temper is lost. I don't know if that means the bike was ruined. Though I would agree with the prior posters concerns about the brazing of the lugs; however, the heat source doesn't seem to have affected the whole bike and bluing can occur at much lower temperatures than required to melt brass or silver solders used in brazing.
To me, the frame appears to have been chrome plated. If so, chrome will start to discolor in the 500°F range and above. So, while it got toasted, it may not be toast, remelting silver or brass happens much higher. An uncertain element would be how fast it was cooled. Which if in a burning building, might have been pretty rapid had it been exposed to a fire department hosing. I would have the frame alignment checked, put it together and ride it if things look good dimensionally.