how to burn/damage PCB

[strawberry]

soldering with 400C 
when tip is tarnished it wont take solder even with 400C and hot air wont help either

[jpanhalt]

Weller seems to disagree: https://www.mouser.com/pdfdocs/WellerSoldering.pdf

In order to raise the temperature of solder above it’s melting point, soldering tip temperatures are usually set between 700°F and 800°F.

I keep mine set at a smidgeon under 750°F (399°C).  The only time I have ruined a tip was when I accidently left it on overnight.

[strawberry]

Insufficient tinning when working with high temperatures over 665 F (350 C) and after work interruptions of more than one hour.

use 250 C for 60/40 and sensitive boards
pb free higher
soldering and desoldering is not the same

[langwadt]

Insufficient tinning when working with high temperatures over 665 F (350 C) and after work interruptions of more than one hour.

use 250 C for 60/40 and sensitive boards
pb free higher
soldering and desoldering is not the same

250'C is far too low, everything will cooked to death before the solder melts