What Is a Cold Welder

Welding is not something that is only restricted to a single process. With multiple types of materials, each welder has its peculiar approach to dealing with the weld. And among many welders, a cold welder is the one which we shall talk about in this post.

Since there is either no or very minimal amount of heat involved, it is known as a cold welder. Cold welding sounds surprising due to the approach since traditional welders use high intense heat to melt down metals to join them together. If you want to work like a pro welding, knowing more about cold welder machines comes first. So without any further ado, let’s find out the insights.

What is a cold welder?

Cold welder or welding is also known as contact welding. The welder is a solid-state welding process that works regardless of fusion/heat to weld the materials together. You might be wondering where the heat comes from to join the material, right? Well, since it is a cold welder, it gains energy from the pressure. The cold welder does not involve a liquid or molten phase in the welded joint.

Another point to be noted for cold welders is that it does not change the material state and the material that needs to be welded remains in the solid-state throughout the process. The reason is simple, no heat input joins the weld, instead of its energy and pressure. The working of a cold welder demands clearing out the oxide layer from the metal in the first place to keep the access achievable.

When you apply the pressure without involving any heat or electrical power, it resolves the metal surface making it pretty smooth. Also, the pressure amplifies the interatomic attraction between the two metal surfaces.

Beforehand Step for Cold Welding

No matter what metal you choose to weld, there is a set approach to join the weld. Cold welding is not too tough to handle, however, it has its prerequisites that you need to fully understand to get the most out of its welding process. The first and foremost thing is the cleaning and the geometry joints alignment. As mentioned above, oxide removal is a must; you can opt for its cleaning either by degreasing, wire brushing, or mechanical and chemical means.

Make sure you remove the oils or other greasy impurities from the metal that is to be welded by a cold welder before you opt for its wire bruising.

The oxide layer is removed after you are done cleaning the metal and then stripping away the impurities which are oxide in this case.


Today we discussed a cold welder. Due to its non-hearing welding process, it has many benefits followed by some limitations such as perfect oxide cleaning and dealing with irregular shapes. This is because cold welding does not have any heat involved so oxide removal causes the inner metal layer reachable, However, the strong bond with no heat achieved by a cold welder is certainly remarkable.