How to Solder Stainless-Steel Sheet Metal

Stainless steel-sheet metal can be formed, fabricated and soldered to make all kinds of household items. You can make jewelry, sculptures and kitchenware from the material. Stainless-steel bowls, platters, pots and pans are prized as kitchenware. Soldering stainless steel can be tricky, so take care when preparing to solder.

Wash the stainless steel you plan to solder to remove all oxidation, grease, grime and dirt. Stainless steel should have little or no oxidation, but use sandpaper to remove it if necessary. Use soap and water to wash grime and dirt. Use acetone to remove grease.

Place the stainless-steel pieces on a charcoal block or other soldering surface. Check that the seams of the stainless steel are flush. Solder does not fill gaps. If the seam has a gap, you will not be able to solder that portion. Use a third hand or binding wire to hold the stainless-steel pieces together if gravity alone will not work.

Paint flux on the seam of the stainless-steel pieces, using a soldering brush.

Put a small amount of medium silver solder at one end of the seam.

Heat the stainless steel evenly until the solder begins to flow. Once the solder is melting, run the flame of the torch along the seam. The solder will follow the flame. Check your work, and allow the soldered stainless steel to cool to room temperature.