QJ305银焊膏是一种基于铜焊接用的铜焊溶剂，本溶剂颗粒均匀细微，在温度为650-850℃，钎焊紫铜及黄铜合金气焊或钎焊时作助熔剂用。也可作钎焊钢及不绣钢、硬质合金的助熔剂。是高温焊接中理想的焊接溶剂。

QJ305 is a copper-based brazing welding used solvent, the solvent particles uniformly fine at a temperature of 650-850℃, copper and brass brazing alloys gas welding or brazing flux when used. Also can be used for brazing steel and stainless steel, hard alloy of flux. Are ideal for high temperature welding welding solvent