Mig Welding Stainless Steel With Argon

Mig Welding Stainless Steel With Argon - Can You MIG Weld Steel Using 100% Argon Gas?

This is a problem that every welding worker will encounter at some point. 

And it is true that you can MIG weld steel even if all there is Argon. 

Mig Welding Stainless Steel With Argon

However, it's not the best choice. 

It is also not recommended.

Every time you look around, there is an if one, or two, or three. 

In this instance it is important to understand the whys and how behind the buts, in order to be able to address this seemingly straightforward question.


Why Would You Use Pure Argon?

The majority of people who read this article already be aware of the reasons why one would be thinking about the use of 100 percent Argon in order to MIG welding steel.

The problem of running out of gas is common to all welders. 

However, no one wants to spend time rushing around for more gas during an office day. 

Maybe your gas company is shut.

If you have one tank that is 100 percent Argon in the workshop for different types of welding then you are able to use it and work. 

There's no interruption to go to refill your MIG gas mix bottle.

The use of pure Argon is an issue to be resourceful as well as efficient when you need to.

But, the welding might not be of sufficient quality, based on what is being welded.


Why Is 100% Argon So Different?

It is important to note that the MIG shielding gas can do more than protect the weld against dangerous atmospheric gasses. 

It's important to keep these gases out, but not to cause the weld to become porous.

However, its composition can affect the quality of the arc as well as thermal conduction. 

These characteristics also have major impact on the final weld.

Therefore, you must be aware of what to be expecting when using 100% Argon for MIG to weld the steel. 

Some of the features you'll experience employing it are:

Argon has an ionization potential that is lower, which decreases the power and arc voltage.

The arc is less stable.

The combination of an instable arc and less power will prevent the formation of a fluid and workable puddle. 

That is the molten pool metal will be hard and difficult to work with.

Argon has less thermal conduction and the edge of the arc are cool. 

This is why you have small, narrow penetration, and less melting.

The filler material rests over the steel in a small high bead.

MIG welds made with pure Argon can be susceptible to cutting undercuts.

Research has proven that MIG welding on steel using pure Argon gas have a tendency to lose ductility.

This means that twisting or bending can cause cracks or break the weld.

In the end, it's possible to bond steel with an MIG welder that has 100 percent Argon Shielding Gas.

However, you'll get a messy-looking weak, fragile weld.

If you require a sturdy quality, durable weld, 100 percent Argon is not the best option in MIG welding steel.

These issues are especially evident with stainless steel and the use of the pure Argon to MIG welding stainless is not suggested.


Using 100% Argon To MIG Weld Steel

If you're in the awkward situation of needing to MIG welding steel using the purest Argon the gas that shields steel, here are some suggestions that could aid you.

Make sure the edges are rounded off that join. 

This will help to bond the base metal and help strengthen the joint.

Increase the heat however be cautious not to burn the thinner steel. 

The process of getting the beads to lie flat will be difficult or even impossible.

Additionally, Argon does produce good welds when you use another method of welding (i.e. TIG) or other base metals. 

There are some base metals for which you may need to use100% Argon using a MIG welders are:

  • Aluminum
  • Titanium
  • Magnesium
  • Nickel (under 1/8 inch.)
  • Copper (under 1/8 in.)

A final note of note For some, the lower penetration can make MIG welding using 100 percent Argon beneficial for welding steel sheets.

In this situation pure Argon will reduce the chance melting the base metal. 

However, you'll likely have a long, narrow bead.


CO2 / Argon Blends Work Better To MIG Weld Steel

The addition of carbon dioxide ("CO2") into Argon solves the problems that come with 100% Argon. 

A 5 - to 25 percent CO2 amount is often added to enhance the result using an MIG welder.

This gas blend gives you the ability to create a puddle with a flexible fluid and more effective penetration. 

Furthermore, it reduces cutting off, and produces less spewing. 

In addition, cooling and heating are better controlled, increasing your resistance to twisting and stretching. 

weld stretching and twisting.

When purchasing an Argon/CO2 blend the gas is marked to show the CO2 content that is added in the Argon.

For instance, "C25" is a 25 percent CO2, 75% Argon Shielding Gas. 

Welding using 100 percent Co2 is referred to as C100.

Blending gases to a higher degree by using a trimix shielding agent (e.g. 90 percent Helium, 7.5 % Argon and 2.5 percent CO2) will result in the highest quality welding to stainless steel.

It can be costly and not always accessible to the novice welder. 

However, for high-quality welds on stainless, it might be worth the price and hassle to find an appropriate trimix blend.


Why Does 100% Argon Work To TIG Weld Steel?

The TIG welding process and MIG welding are different in applying the filler material as well as the type of electrode employed. 

This affects the characteristics and arc that the welding produces.

MIG welding employs the filler as an electrode, which is why there is the requirement of continuously feeding wire towards the tip while it's consumed.

However, TIG welding used a non-consumable tungsten electrode while the filler gets then fed into the arc independently. 

The electrode creates a steady and robust arc, however the tungsten tip has to remain intact and clean.

Therefore, TIG welding demands a gas that remains inert even at extremely high temperatures. 

Argon stays inert even at high temperatures. 

It also makes it easy to start and maintains a steady arc, and assists in helping to keep the electrode of tungsten clean.

Therefore, TIG welding of steel using Argon is possible, while MIG welding on steel is facilitated from an Argon/CO2 mix.

Iklan Atas Artikel

Iklan Tengah Artikel 1

Iklan Tengah Artikel 2

Iklan Bawah Artikel