Muggy Weld SSF-6 Demonstration: Steel to Brass Bonding

Muggy Weld customer Rod Madison builds 1/3 scale remote control planes as a hobby, and recently shared a video testimonial and photos of his latest RC plane construction project.

For this application, Rod needed to solder steel to brass, and chose SSF-6 Silver Solder to bond these dissimilar metals. SSF-6 is flux-coated, which simplifies the soldering process and helps the solder flow evenly during heating. With a bonding strength of70,000 psi, it provides a reliable connection for a wide range of metal-joining tasks.

This 56% silver solder can be used to solder steel, brass, cast iron, stainless, copper, bronze, silver, gold and more–with a simple propane or oxyacetylene torch. No specialized welding equipment is required, making it a practical option for hobbyists and metal repair projects.

Rob was pleased with how quick and easy he was able to solder steel to brass with Muggy Weld SSF-6, and wanted to share his experience with other Muggy Weld viewers.

He wrote:

So, Mike, this is steel soldered to brass. The steel tab will hook to a push rod to move the elevator up and down on my 1/3 scale Piper Cub. (PLANE)

Rob used the following technique to solder steel to brass:

Prepare the base metals by pre-cleaning both the steel and brass with a wire brush or other abrasive agent such as a Dremel tool.

Broadly heat both metals evenly until both metals start to change color. Note that steel melts at a lower temperature than brass, so slightly more heat should be focused on the brass to heat the steel and brass to the same working temperature.

Apply the flux by lightly touching the SSF-6 silver solder rod to the joint without melting the solder. Heat the metals evenly until they reach a dull red color. Once the correct temperature is reached, introduce the solder and use the flame to allow it to flow into the joint.

After the steel and brass are joined, allow the part to cool naturally.

When the joint has cooled, remove remaining flux residue using warm water and a wire brush. The metals can then be cleaned or finished as needed for the application.

Disclaimers:

Please visit https://www.aws.org/Standards-and-Publications/Free-Resources/#YourResources prior to using our welding products, and adhere to all AWS welding safety guidelines.

Further product safety information is available at https://muggyweld.com/safety-guidelines

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Updated 12/25/25