Why does Stainless Steel rust?
The manufacture of metal structures must be carried out by professionals and with the appropriate materials, the electrodes are responsible for joining the metal parts used.
Not all are the same, each type of metal and the place where it is used deserves to work with an electrode capable of meeting specific requirements.
A welding electrode is a metal rod coated with different materials, the type of material of both the rod and the coating helps us to classify the types of electrodes that exist and their different uses.
The electrodes are mostly classified according to the characteristics and properties of the filler material and the use they will have, now, what is the filler material? It is the central part of the electrode, the exposed rod that is used for fixing it to the electrode holder.
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The categories of the types of electrodes are defined by two organizations mainly, the AWS (American Welding Society) and the ASME (American Society Mechanical Engineers), these are the most important authorities in the field of welding. welding.
The type of electrode that will be used in each job must be clear, since its final results depend on this.
There are many different types of welding electrodes, and there are many ways to classify them, according to their composition, their use, the way they are presented, among others, here we will classify them into three main categories:
This type of electrode has a metal core formed by the filler material, which is covered by a chemical-based compound.
The function is to create gases to protect the molten metal from the penetration of oxygen and nitrogen from the atmosphere, as well as to prevent sudden cooling in the metal.
The most used electrodes within this category are:
They are the type of welding electrode that does not have a coating, they are just a laminated wire, these are used in gas welding processes, called inert atmosphere, to prevent the entry of oxygen and nitrogen.
This type of welding is known as TIG welding, these electrodes are made of tungsten or its alloys, the results obtained with this type of welding are of higher quality and more resistant. It is applicable to most metals, steel, aluminum.
It is a type of continuous electrode, similar to the shape of a thread, hence its name, it allows continuous work. This electrode is supplied automatically and continuously through a feed reel, an example of this type of electrode would be the AW ER 70S6.
The different types of electrodes or in this case welding wires are classified according to their morphology and chemical composition, they are classified into two large groups, solid wires and core wires.
Solid wires are made of a single metal, they usually have the same chemical composition as the material, there are various diameters of this type of electrode, but the most common are 0.6; 0.8; 1.2 and 1.6 millimeters.
In the case of wires with a core and gas protection, their structure is different, they are not made up of a single solid metal, they are made up of granulated powder inside.
This type of continuous electrode has greater stability and more precise penetration than that of solid wire; so a more aesthetic union is achieved.
In the different types of electrodes we can read letters and numbers such as E6013, each element of that definition represents a characteristic of that category of electrodes, let's see what each one means:
We must take into account several key aspects to know what type of electrode we should use,
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