High-melting-point bar solder is specially developed for tin furnace temperature above 400 degrees. It has the advantages of good liquid phase, very little tin dross and low oxide content. It is suitable for the production needs of transformers and electronic capacitors in high temperature operation. The high-temperature lead-free solder bars developed by our company can be used at high temperatures above 450 °C (the working temperature should exceed 350 °C ~ 400 °C, the working temperature of aluminum wire should be around 350 °C, and other effects should exceed 400 °C), and the liquefied surface can be long It maintains a silver-white liquid level over time, produces very little tin dross, and produces very few oxides. It is especially suitable for the production of enameled wires and various transformers.