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How To Weld Copper To Stainless Steel?

How To Weld Copper To Stainless Steel?

If you’re a DIYer or hobbyist looking to weld copper to stainless steel, then this article is for you. Welding these two materials together can be tricky, but with the right tools and techniques, it can be done successfully. Let’s take a look at the step-by-step process of welding copper to stainless steel.

Step 1: Select the Right Welding Equipment

The first step in welding copper to stainless steel is selecting the right welding equipment. You will need a MIG welder that has a spool gun attachment that is specifically designed for welding aluminum. A spool gun is necessary because it will allow you to deliver more consistent wire speed and current levels while welding aluminum. Additionally, you should use a standard 5/64-inch diameter contact tip on your welder when working with aluminum.

Step 2: Prepare Your Materials

Once you have the proper equipment selected, the next step is preparing your materials for welding. Before beginning any project involving welding, it’s important to make sure all surfaces are free from dirt, dust, oil, rust, or paint that could contaminate your welds. To prepare your copper and stainless steel for welding, make sure that both surfaces are free from any impurities and wipe them down with acetone or alcohol prior to beginning your project.

Step 3: Set Up Your Welder

Now that your materials are ready for welding, it’s time to set up your welder correctly. Make sure that you have set up the voltage correctly according to the manufacturer’s instructions (typically 20 volts), adjusted any settings if necessary (such as amperage), and connected your spool gun correctly (if using one). Once everything has been set up correctly, turn on the power switch and wait until your welder has reached its ideal temperature before continuing on to Step 4.


With these steps in mind, anyone can successfully weld copper to stainless steel for their DIY projects or hobbies. Just remember that safety always comes first when working with any type of welding equipment, so make sure you are wearing all of the necessary safety gear, such as gloves and face shields, before starting work! Additionally, it’s always best practice to practice on scrap pieces of metal before attempting larger projects in order to get comfortable with the process of welding copper and stainless steel together properly without any mishaps occurring during your project’s construction phase. Good luck!

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