How to Silver Solder Large Steel Parts with SSQ-6 Solder Paste

2  How to Silver Solder Large Steel Parts with Muggy Weld SSQ-6 Silver Solder Paste customers have asked how well SSQ-6 silver solder syringe works on larger, thicker metals as compared to thin metals? Of course, we’d prefer to show you than tell you how this brazing process works.

Broadly heating the area around the joint is advised especially on larger or thicker metals, and preheating the metal adjacent to the SSQ-6 application point ensures a better flow and stronger bond to the parent metal surface.

Once the steel tubing reaches working temperature, add SSQ-6 silver solder paste by pressing the plunger gently, making sure to avoid heating the steel applicator tip.

Tip: When using a vise, be sure you have adequate space between where the metal is clamped and your work area, as vise will act like heat sink pulling heat away from the joint and inhibiting flow of the silver solder paste. Note in the video how the flux and the metals are moving away from one another. The same recommendation applies when welding on a metal table—tables are great work surfaces but always remember to elevate the part off the table with something like a coat hanger to ensure the table does not pull heat from the work area.

842°F and above is considered brazing by the American welding Society, if the filler metal melts under 842F°/450°C this is considered soldering or solder temperatures.

Notice how long it takes for 1 inch of steel pipe to arrive at the 1050F working temp of SSQ-6, even when silver soldering with an oxyacetylene torch. It is important to bring the parent metal to working temperature quickly, to avoid separation between the part and the flux (as shown) If your SSQ-6 silver solder is not flowing, the part has not reached the proper working temperature.


Note: Please observe all AWS Safety & Health Guidelines when using Muggy Weld products.

Caution: Do not store near edible items. If you refrigerate SSQ-6, please store in a “chemical only” designated refrigerator.