Solder Copper with Super Alloy 1: How to Create a Seam with Low Temp Solder
For this video demonstration we created a joint with two thin pieces of copper, then joined the parts to make a seam, and soldered the joint with Super Alloy 1.
We used a propane torch for this application; however, Super Alloy 1 solder can be applied using almost any heat source: propane, butane, heat gun, soldering iron, oxyacetylene and more. Super Alloy 1’s low 350°F working temperature ensures an even flow regardless of torch.
First, secure the parent metal to be joined. Heat Freeze Heat Paste can be helpful for this task, or the parts can be secured with a vice if necessary.
After securing the part and pre-cleaning the parent metal to ensure proper bonding, dip the copper solder rod into the flux and apply the flux to the work area. Gently and broadly pre-heat the copper evenly with the torch to gradually bring the copper up to 350°F. No need to worry, Super Alloy 1’s honey colored flux is specially designed to transform from honey colored to root beer brown when the copper reaches 350°F, acting as a visual temperature guide to prevent overheating the copper.
When the flux changes color, add a drop of the copper solder rod to bond the joint, then apply more flux and rod to fill the seam. If cosmetics are a concern and you wish to hide the seam, simply add more flux and flow the copper solder until it flattens out.
Notice the seam, sealed front to back (30,000 psi) with solder.
Allow the copper part to cool naturally, then remove excess flux with a wire brush and warm water.