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DECA MIG/MAG welding machine

DECA wire welder

There are 3 products in category DECA MIG/MAG welding machine.
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DECA continuous wire welding machine: with gas or without gas?

Do you need to equip your workshop with the best DECA wire welding machine on the market? We present the largest variety of DECA gas and non-gas continuous wire welding machines (MIG/MAG). Machines with many qualities and the best guarantees and features.

Tungsten inert gas welding (TIG) and metal inert gas welding (MIG) are two types of welding processes. There are some similarities and many differences between the two methods.

MIG/MAG welding is an arc welding process under gas shield with a consumable electrode. The arc is produced by an electrode consisting of a continuous wire and the parts to be joined, which are protected from the surrounding atmosphere by an inert gas (MIG welding) or an active gas (MAG welding).

The most common diameters in this type of welding are 0.8, 1.0, 1.2, 1.6 mm and in some cases 2.4 mm. Choosing the correct diameter during welding is very important because large diameters require high intensities, large penetrations may occur and holes can be made in the workpiece. On the other hand, for small diameters, low intensities are applied to get low penetrations, and penetration into the workpiece can be very small as well.

The standard wire format consists of coils of different sizes. The wires are usually covered with copper so that the conductivity of the wire to the contact tube is good, and it also reduces friction and prevents oxidation. Flux-cored wires are also used, which are filled with metal powder or deoxidant.

The main advantages offered by the MIG/MAG process of a DECA wire welding machine

1. can be welded in all positions;

2. no slag to remove;

3. good appearance or finish (few spatters);

4. little formation of polluting and toxic gases;

5. good quality radiographic welding;

6. welding of thicknesses from 0.7 to 6 mm without edge preparation;

7. semi-automatic or automatic process (less dependent on operator skill);

8. high productivity or high rate of added metal (main advantage).

The main advantages of this process are a high productivity and excellent quality, in other words, large quantities of metal can be deposited (three times more than with the coated electrode process), with good quality.

In the MIG (Metal Inert Gas) variant, the shielding gas is inert (it doesn’t actively influence the welding process) and is very stable. On the other hand, in MAG (Metal Active Gas) welding, the shielding gas is inert in terms of weld contamination, but acts thermodynamically in the welding process.

DECA continuous wire welding machines are designed to work at a continuous nominal current. The machines have to stabilize the temperature of their components at the nominal working intensity after a certain period of time, but in standard MIG/MAG welding it is not possible to work continuously, as there are prep times, wire changes, gas cylinders, operator breaks, etc. Due to the fact that continuous working is not possible, temperatures drop depending on the break times, so it is necessary to consider the operating factor.

The operating factor is the quotient between the welding time and the total working time. During soldering breaks, equipment components are cooled, stabilizing their temperature within a small range below their maximum working temperature.

MIG DECA welding (inert gas wire welding)

Of the inert gases available in Europe, argon is the most widely used, and in the United States, helium is the most widely used.

High purity argon is used only for welding titanium, aluminum, copper and nickel. For welding steel, it should be applied with a less than 5% mixture with oxygen, since pure argon produces uneven bites and beads. This improves penetration and widens the underside of the bead.

The use of helium produces wider beads and lower penetration than argon.

MAG DECA welding (active gas wire welding)

CO2 is one of the gases used in this type of welding. It is an odorless, colorless gas with a spicy flavor. It weighs one and a half times more than air, and it is also an oxidizing gas that at high temperatures dissociates in a reaction in the arc of 2CO2-2CO2+O absorbing heat and in the recomposition in the base 2CO2+O emitting heat.

Its disadvantage is that it produces very energetic arcs, which also produce a large number of projections. On the other hand, it is a much cheaper gas than argon, capable of producing much deeper and wider penetrations than argon. It also has the advantage of reduced bite risk and lack of fusion.

The Ar+CO2 blend is usually used with blend amounts between 15 and 25% CO2. The advantages of working with this mixture are better visibility of the pool, a smoother arc with less turbulence, a cooler melt pool, better lace appearance and presentation, less protrusion and better arc stability.

The only and biggest disadvantage of the mixture is the price, but on the other hand it is necessary to compare it with the great benefits it brings us, these being normally greater than the cons.

All the gases that can be used during DECA continuous wire welding

The shielding gases that are used during MIG and MAG wire welding processes are divided into two distinct categories, inert and active.

Inert gases can be: argon, helium, and all mixtures composed of argon and helium. Active gases, on the other hand, are mainly composed of carbon dioxide.

Argon: an inert gas formed in the atmosphere. It is an extracted gas, so it may contain a lot of impurities. It is used in the MAG welding process and has a good stability and a low thermal conductivity, and remains fluid even at high temperatures;

Helium: helium is an inert gas and it is one of the rarest to find, and also the most expensive. Its stability in penetration is not high, in fact it is not considered its advantage, but it can be very useful to weld big thicknesses or materials that have a high thermal conductivity. Helium is much lighter than other gases and offers a lot of protection during welding;

Carbon dioxide: this is an active gas that is very easy to find in nature, as it is present in the air. It is the most widely used gas despite being very unstable during welding, but the advantage is that good penetration can be achieved when using carbon dioxide;

Active mixtures: all gases in their pure state can do the job at any temperature, but mixing gases and making them active can provide better stability without compromising the protective action. Active mixtures can be composed by argon and oxygen or argon, oxygen and carbon dioxide.

Wires of a DECA wire welding machine

There are several DECA wire welding machines on the market with different welding wires, all different from each other. Mainly the wires are divided according to their chemical compositions. What you need to consider when buying a replacement welder or wire is that there are no electrodes or moisture on it, as it can jeopardize safety while working. Also, an uneven wire could be the cause of an unstable weld, and therefore the end result could look bad.

The main division is made between solid and flux-cored wires.

Solid wires: they have the same base composition, diameters can be from 0.6 mm up to 1.6 mm. In addition, this type of wire consists only of metal.

Flux-cored wires: these are made up of granules, they have much more stability in penetration and guarantee a very beautiful final result.

DECA MIG and MAG welding machine, all metals that can be welded

With MIG and MAG wire welding, many materials can be welded, including:

Aluminum - this material is welded in direct, pulsed or reverse current through the MIG process. Various techniques are used for welding, such as short-arc welding, which is very effective even for reaching the most hidden points. Since aluminum has many special characteristics, it is advisable to mill the points.

Stainless steel – it’s welded with a direct current through the MAG welding process. Know that the percentage of Argon should never be lower than 98% if you want to obtain a satisfactory result. All parts thicker than 2.5 mm must be dulled before they can be welded.

Carbon steel - steels are welded with reverse polarity and MAG welding is applied, very often using only Carbon Dioxide blends, although the higher the percentage of Argon, the better the final result.

DECA no-gas continuous wire welding machine

The catalog of DECA no-gas wire welding machines is very extensive, and there are many products that can be used for professional or semi-professional work, but also for small DIY jobs around the house. Users often choose a DECA no-gas wire welding machine for its practicality, because they do not have to carry all the countless accessories needed for gas wire welding. In addition, there are many savings: you will save on gas, but you will have to buy a flux-cored wire, which costs slightly more. Many of DECA's welding machines are multi-process, so that a single unit can be used in several ways. There are several no-gas DECA wire welding machines on the market: an inverter multi-process welder, with a torch included, may be right for you. All DECA no-gas continuous wire welding machines have an excellent price-quality ratio.

DECA continuous wire welding machine with gas

Even in the case of DECA continuous wire welding machine with gas, the offer provided by the manufacturer is wide and you can find tools suitable for everyone.

Usually, a gas welding machine is chosen for the stability it offers during welding, in fact through this process you will have a much more refined end result. Even though the DECA gas wire welding machine may be bulkier to transport and also heavier, you can use any type of wire, both flux-cored and solid. So there will be a considerable saving on the purchase of the wire to be used, but a substantial expense on the purchase of the gas. As already mentioned, DECA wire welding machines can perform several functions in a single unit. Gas welders also require several accessories, and you can choose from several models to suit your needs: for example, there are many models that are lightweight and very easy to transport in order to do outdoor work. The price-quality ratio in this case is also very good, so it can be a great appliance to use if you are a beginner, but also if you do this job professionally.


In conclusion, wire welding can be great for those who work in the field, but also for all hobbyists. It is very easy to use and you don't need many accessories, the important thing is to always keep your protective equipment with you, such as gloves and goggles. Before proceeding with the purchase of a DECA wire welding machine, carefully choose whether you prefer the gas or non-gas version, after which you just have to proceed with your purchase.

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