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What is Filler Metal, and How is it Used in Welding?

As we discussed in a recent post, welding is the process of joining metal together through introduction of high-heat, followed by a cooling process. Though there are different methods of welding, the end goal is the same: to join the metals together and form one cohesive piece.

The heat turns the metal into a soft, plastic-like state, allowing it to bond. However, an additional material is sometimes needed to help bridge the two sides and create a more permanent hold.

This is called filler metal.

What is Filler Metal?

Filler metal is a joining material that’s used in a number of processes, including brazing and soldering. In the case of welding, it’s placed at the point of welding to help better connect the weld. Some types of welding use filler metal only to fill in gaps. Other types of welding don’t use filler metal at all.

The type of metal used for filler can vary from project to project. Most commonly, it is either aluminum or tungsten based.

Is Filler Metal Used at Ever-Roll?

At Ever-Roll, we specialize in upset welding, a type of resistance welding that runs electrical currents through two metal ends to heat them up. We use this to create wire rings, burner rings, and more. Because the metal ends are of the same size, shape, and material, a filler metal isn’t typically needed.

Instead, the two ends are able to join together independently, creating a strong, near-seamless finish. We do perform an extensive amount of wire welding (MIG welding), where do utilize filler metals.

Additionally, Ever-Roll provides tube-bending, forming, flattening, and piercing. We’re equipped for mandrel bends, rotary draw bends, and CNC bending, depending on what the situation calls for. Whether you’re using us for welding ring fabrication or metal tube manipulation, you can expect the same quality results.

Contact us to get a quote or discuss a future project.

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