SOLDER TWO PIECES OF BRASS TOGETHER
1 The job is to solder these two test pieces of brass together. Firstly, add flux to the joint with an old paintbrush. Flux does two jobs: it cleans the metal and acts as a catalyst to transfer the heat from the soldering iron.
4 This is a good joint, with a good meniscus of solder along the joint. But to make it even better and stronger, apply some serious heat from a blowtorch. A small one from Nimrod is ideal.
2 Start at one end and slowly draw the soldering iron tip along the joint. Don’t be afraid to re-flux and continue soldering. Add more small amounts of solder to complete the joint as you arrive at the other end.
5 Here, as you can see, the joint is excellent in both looks and strength. A rub over with a fibre glass pencil will remove any traces of flux and excess solder.
3 To check to see if the soldering has been successful, turn the job around and look at the back. A good join will be soldered both sides. Here, there hasn’t been enough heat to permeate the solder through the joint.