Why is the 380°C soldering iron tip not tinned?
It is absolutely impossible for the tip of the 380°C soldering iron not to be tinned.
Then why did some customers report that the tip of the soldering iron is not tinned when performing lead-free soldering at 380°C? First of all, the 380°C is measured in a static state, but actually there is no such a high temperature at the moment of welding.
Let's look at the relationship between temperature and soldering speed in the case of leaded and lead-free soldering:
Type of welding wire Melting point Welding temperature Welding speed
6337 welding wire 183℃ 350℃ about 4 seconds/piece
Lead-free solder wire 220°C 390°C About 6 seconds/piece
Our normal soldering speed is 3-4 seconds per solder point, but it is about 6 seconds per solder point when we perform lead-free soldering at 390°C, and the soldering station needs a longer time. Different soldering stations have different temperature compensation capabilities, the faster the better, the soldering stations have poor temperature compensation capabilities, and the temperature does not reach during normal welding. Therefore, some customers reported that the tip of the soldering iron was not tinned when performing lead-free soldering at 380°C.
