Dude, aluminum gets red hot at 500 degrees, melts not far above that. I did smelting in HS, aluminum doesn't take much to melt. During the camp fire, I did cleanup operations. Police cut into every gun safe in the debris to "prevent" looting. Only, this was done post fire. Every aluminum firearm was an aluminum puddle with a burned steel barrel. We came across a LOT of guns. Pretty much only barrels, slides, and revolver frames survived the fire but were not repairable. Aluminum does not survive fires, period.
Dude, aluminum gets red hot at 500 degrees, melts not far above that. I did smelting in HS, aluminum doesn't take much to melt. During the camp fire, I did cleanup operations. Police cut into every gun safe in the debris to "prevent" looting. Only, this was done post fire. Every aluminum firearm was an aluminum puddle with a burned steel barrel. We came across a LOT of guns. Pretty much only barrels, slides, and revolver frames survived the fire but were not repairable. Aluminum does not survive fires, period.