point is 183 degrees, lead-free solder melting point is 227 degrees, usually the welding temperature is 300-380 degrees, 380 degrees is the temperature of the dividing line, higher than 380 degrees, iron head oxidation and loss is extremely fast, seriously affect the heating core life.
The Higher than 380 degrees temperature display will be beating, the higher the temperature, the greater the beating!
Recommended in the 300-380 degrees for welding work, most of the work can be carried out, the