What is the best gas mix for MIG welding?

A 75/25 argon and CO2 blend is typically considered to be the best overall option for MIG welding, so that’s our top recommendation at Vern Lewis Welding Supply. A “tri-mix” of helium, argon, and CO2 is also sometimes used.

What is C 25 welding gas?

Praxair’s argon/carbon dioxide blends containing 20-25% CO2 by volume (StarGold™ C-20 and C-25), are commonly used for shielding solid wire used in a short-circuiting and globular transfer mode. A variety of material types and thicknesses can be joined using this gas blend in all welding positions.

What happens if you inhale argon gas?

Argon is nontoxic and largely inert. It can act as a simple asphyxiant by displacing the oxygen in air to levels below that required to support life. Inhalation of argon in excessive amounts can cause dizziness, nausea, vomiting, loss of consciousness, and death.

How much does it cost to refill shielding gas?

In general, you can expect to spend 150 to 350 dollars on a new full tank of shielding gas. For example, 40 CF Argon 75/25 CO2 costs roughly 150-170$.

Can you weld with just CO2?

The most common of the reactive gases used in MIG welding is Carbon Dioxide (CO2). It is the only one that can be used in its pure form without the addition of an inert gas. Pure CO2 provides very deep weld penetration, which is useful for welding thick material.

What should my MIG welder gas be set at?

The polarity connections are usually found on the inside of the machine. Set gas flow. Turn on the shielding gas and set the flow rate to 20 to 25 cubic feet per hour.

Which is better 75 / 25 or C25 gas?

Better Aesthetics – When it comes down to it 75/25 just looks better. It looks flatter and not as rounded on top like Co2 would. Less Spatter – C25 also gives less spatter and clean up at the end. Of course this all depends on weld settings and a few other things but for the most part, you won’t have as much spatter.

What kind of gas is in a tri mix?

This is a tri mixture which means it is made up of 3 main gases. These gases would include 90% Helium, 7.5% Argon, and 2.5% Carbon Dioxide. However, you can also use a mixture of 2% Carbon Dioxide and 98% Argon as an alternative option. What is Stainless Tri-Mix used for?

What kind of gas do you use for mild steal?

If you’re welding regular mild steal I recommend going with a C02 based gas before using Argon. The final gas mixture I want to talk about is Stainless Tri-Mix. This is a tri mixture which means it is made up of 3 main gases. These gases would include 90% Helium, 7.5% Argon, and 2.5% Carbon Dioxide.

How much does a 75 / 25 CO2 tank cost?

Pete called his high pressure gas supplier and checked on the prices. He was pleasantly surprised to find out the cost per cubic foot of 75/25 was cheaper on the big tanks. The rental charges were more than he was paying but he expected that.