What is the difference between a phosphor bronze electrode and a silver-copper electrode? What welding rods are used for welding copper tubes and brass tubes?

The difference is

1) Different chemical composition, one for phosphorus and one for silver.

2) The melting point of them is also different, that is, the lowest brazing temperature is different.

3) The strength after welding is different, copper phosphorus is brittle, and silver and copper are high in strength.

Choice: Both can be used, but also depends on the applicable environment of the workpiece after welding, such as the working temperature, whether it is subject to greater force, etc., contact the manufacturer, they will give you a comprehensive answer.