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How to Choose the Right Welding Gas - Kevin Caron
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- เผยแพร่เมื่อ 24 เม.ย. 2012
- From www.kevincaron.com - Artist Kevin Caron answers viewers' questions about how to select the right type of welding gas for their MIG or TIG and for the specific type of metal they are welding, whether it's steel, stainless steel or aluminum, thin or thick metal. He shows two varieties of gas for MIG welding and one for TIG and then explains how to find more information easily. Find more how to videos at www.kevincaron.com
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A decade later and the guy is still spot on. BRAVO!
Thanks Jim! Also a decade older and grayer.
Some things to add to the conversation. The cheapest way to mig weld and for the hobby guy would be 100% co2. the trade off is more spatter. 75/25 gives you less spatter and makes a pretty weld. If you are doing stuff with a lot of mill scale or need deeper penetration then 90/10 mix works well. For tig welding You can also add helium in with argon when tig welding aluminum. If you have a smaller machine this process with also a pre-heat of the material will almost double the maximum thickness that your machines is rated to weld.
I'm relatively new to MIG welding (been oxy-acet welding for decades) but learning fast. Kevin has omitted mentioning the key thing to understand what gas mix for a hobby welder or part-duties welder to choose: cost. Historically, CO2 was a cheap gas, but is not inert - it breaks down and chemically reacts at arc temperatures. Argon was ideal (doesn't react at all) but expensive. So what came about is various compromises. 75:25 Ar:CO2 mix, 88:12 etc. All these mixes work in welding mild steel, but at different welder unit settings. The more skill you have, the more you can tolerate CO2 in the mix. The thicker the metal you are welding the more you can tolerate CO2 in the mix. It happens that the only mix stocked by my local supplier is 88:12. It works fine for me (mild steel work). I obtained a bottle of 75:25 from a more distant supplier recently, just to try it. After I got used to it, and adjusted my welder, it too works fine, albeit with a bit more spatter and a bit of carbon.
These days (at least where I am located) gas price differentials have come down, so the incentive to save money by having a greater percentage of CO2 is mostly gone, and I'll be going back to 88:12. Note: reading the gas supplier's data sheets revealed that these percentages are only approximate.
A mix with helium in it is not available here - unless you buy in very large quantities.
Thank you for watching and posting.
Update: I now have 2 years experience MIG welding, and my local supplier has started stocking an argon mix with 5% CO2 and 3% oxygen. Why you would want oxygen I don't know - I presume it lets them use a cheaper process to make argon with a low CO2 content. Since they say it is better for welding thin sheet and that's what I do, I gave it a try. I needed to re-optimise my welder settings, but after doing that, there's not a lot of difference. Spatters a bit less. Tendency to burn through very thin sheet is about the same.
I worked at shop where they started getting critical about the gasses for different jobs so we were always changing bottles. You had to coordinate your welding for the day. One gas for stainless, another for aluminized steel, another for structural. I worked real good though.
Where I work now, mostly TIG welding with argon they got a bottle of argon with 10% co2 by mistake and they wanted me to try and see if I could use it up. I tried using it for what I weld and seemed to work okay but a little ‘ sooty ‘ looking. Then I welded a part for machine that was going to be turned down. Guy came over later and asked what I did to it as it was hard as a brick and could barely turn it.
I took the bottle back to guys in charge of them and told them “ no, I can’t use it . You’ll have to try and exchange it “. That lousy 10% made lot of difference.
Interesting!! Never heard of that happening, but good to know.
Interesting story about carborizing. I recently tried using a carbon arc rod in my stick welder stinger as a "poor man's Tig". The arc had the whitish CO2 look, I guess from the rod being consumed. The welds were turning out extremely brittle until I realized what was going on and started to preheat a bit, and let the joints cool down slow. A spark test confirmed it. I've used this technique to make hardened edges/faces.
Thanks Kevin, straight forward advice. TIG welding simply rocks, single gas makes things cheaper and easier. The three guys I watch on youtube for welding are you, Jody at weldingtipsandtricks, and of course Mr. TIG. I just started TIG welding and my first project was thin walled aluminum tube. Boy has that been a challenge, but I got'r done thanks to you guys!!
Now lets see some photos!
I watched your video on butt welding tube, using angle iron as a support, very helpful.
My joined work pieces were aluminum tube, 0.032" wall to 0.07" wall, both had 0.375" OD.
Straight argon at 6 lpm, 0.040" & 0.0625" electrode, 0.035" & 0.0625" 4043 rod, gas lens,
6 cup, 10 to 30A, light on the cleaning action, 120Hz, no pulse, Everlast PowerTIG 250EX.
I was struggling with heating the thick piece first. Was not sure how to set the Arc Force?
Have to warn you, these are ugly welds, but they seem strong and no leaks. So pic at link below:
drive.google.com/open?id=0B8VB51HvdSzuU09BX1U0Si1lb2c
Great info. You told us enough, but also told us where to do in depth research. I MIG welded years ago in various shops. Most places just used 100% CO2 back then ( 35 yrs ago). Things have come a long way since then. TIG is totally new to me, but I'm looking forward to trying it. I just bought an EVERLAST 160 tig/ stick machine that you approved and demo'd. Stick is an old friend but TIG ???? I'm glad there are guys like you to keep us old farts up to speed on latest, the greatest and the howto's. Welding never leaves your blood. Now I'm just a silly old dude playing with a few new toys and making a few things for friends, neighbours and family. Making steel framed picnic tables is fun and quite popular.
Just a kid at heart!
Thanks for posting this. I bought a multiprocess welder to learn TIG and a tank of 100% Argon. I swear I heard somewhere I needed to use 80/20 argon/CO2 and have been trying to figure out what to do about it.
I still don’t know what I’m doing, but now I don’t know LESS about what I’m doing!
Glad I could help, thank you for watching and posting.
New to welding, thank's for the education Kevin.
You're right. Finding the right shielding gas can only be said by experienced welders. I've tried a lot of different shielding gases. In MIG, MAG, TIG. Some special shielding gases are really not needed for welding and cost a lot of money unnecessarily.
My gas bill can get out of hand really quickly! I have 8 K bottles in my shop!
Lol. Kermit d frog welding school. Good stuff.
Good Job of explaining it . You are correct about WiKipedia . It takes the opinions of some out of the picture . Some have success with trimix and some just use 75/25 but its best to use the Trimix on thicker metals ...
Kevin Caron, thank you so much. 🙏🏻👍🏻 Very informative 💯
Thank you for watching and posting. If you get a chance, please click on an ad or 2. Helps pay for the videos.
Nice explanations. Thanks Kevin. It's all clear as mud now!!!
Kevin
Helium also has a place in TIG welding, especially welding THICK aluminum with a welder that maybe little underpowered. That plus pre-heating the aluminum can product some amazing results on really thick aluminum. Down side is that helium is expensive, so some folks buy a seperate bottle of helium and flowmeter and run the 2 gases simulaneously (y'd together before it gets to the machine) and dial in what they need. Less wasteful over the long run, but more expensive up front
John
John
Never tired it but have heard of it for sure.
Thank you Kevin!
You are most welcome.
Had to hear a few time for it to click thanks for this
Thank you for watching and posting.
Good description basically tig you uses 100% argon and for mig you have many choices. So you need a good store to keep track of all the different types of blends from oxygen , argon , heilum , carbon dioxide ,...etc. Its probably better to rent your different types of bottles as owning all the different tanks seem cumbersome when they still have to fill them /service them anyway
So true! Thanks for watching.
@@KevincaronSculpture Also not sure if you ever covered this but if you want to do a video covering the hours of continuous uses for different size welding tanks with different gas types in them that be cool. As harborfreight has www.harborfreight.com/welding/welding-accessories/portable-torch-kit-with-oxygen-and-acetylene-tanks-65818.html and if i was to some day purchases one of those i like to know if any airgas/ company would fill them up as well as how long you get before a fill up is need. Same applies for the mig , tig shield gas tanks. Because there is different size tanks to choose from.
Can I use propane for welding steel because google said I could but I’m not 100% sure
You can use propane and oxy but propane is not as hot as Acetylene. So you will wind up using more propane to do the same job.
@@KevincaronSculpture thank you so much for the info.
Thanks, thanks, thanks alot Kevin good job.
Very welcome
Can you mig with argon only?
You can but you won't like the results. Watch this video please, th-cam.com/video/3SXp7nYhe4A/w-d-xo.html
Kevin. Thanks for the video.Hve you tried using "jumping jack flash?"....It's a gas, gas,gas! :-)
lol.
Well said
C-25 is a little "cooler" than CO2. They like to use it a lot for production welding because of the low spatter, less or no cleanup means lower cost welding. C-25 is better than CO2 for thin sheet because of less burn through.
But for thicker metal or structural, go for CO2. Hotter and more penetration, may not look as nice but the important thing here is strength. A joint that will not come apart when a 10 ton truck goes over a bridge.
Cool, thanks for posting!
You should have made a post, you make a hell of a lot more sense than tri-mixtures for is going to be used mostly at home , because a professional already knows what gas to use ! Professionals are not going to be clicking on this site if their worth their salt !
I just picked up a pro 140. It came with a tank of 100% co2. Never welded with straight co2 before. Most of my welding will be anywhere from 1/8 to 3/8 steel. My local supply said he would exchange it for a tank of 75/25 mix if I wanted too. Not sure which way to go. Been welding with flux core and am tire of the splatter. Does 100% co2 splatter as bad as flux core?? Any help is greatly appreciated...
Thanks
Switch for the mix gas. Works a lot better and cleaner.
how do you open the gas for welding which side do you turn it to open and closed?
Why would I pay for argon to tig steel. Please explain. I should be able to use the same mix as my mig. Right? I don't do aluminium.
Different process needs different gas. Watch this video, th-cam.com/video/r5O-jZSSebQ/w-d-xo.html
Thanks you so much Sir
Most welcome!
Have you used just co2.for mig?hobby welders have this in the uk.shields very poor.but cheap.they use this for root welds.best is a mix .called c25.co2 plus argon.but nobody uses that.
Tired straight co2 once. Too smoky for my taste. I like the mix gas of co2 and argon.
Thanks for a great instructional & well put together video! No Lame music or super fast editing. I have just now started my rooky season in welding. I am trying to design custom bike frames mostly all steel 1-1 1/2 inch pipe. Any help or pointers to get me on right track like type of metal etc. would be greatly appreciated! I am subscribing NOWThanks Again...Dj
Hate to say this but I think you are late to this party. Most bike frames are carbon fiber or titanium now aren't they?
Mostly I would point you towards a tig welder and lots of practice in thin wall pipe fitting and welding.
Thanks Kevin!
You are welcome Sir!
Don't forget to give me a thumbs up and stop over to my site and see what I am working on.
Kevin, great video as always but maybe check your mic for next one as it seems like its turned up very high, maybe need to adjust your levels. seemed to be clipping the audio a bit. maybe knock it back by 10db if you can on the mic or during editing
Thanks for the heads up, been struggling with audio issues for a while now..
And here I thought Helium was just for party balloons and making your voice sound funny... Learned something today! Thanks guys.
Great video Kevin!
Thank you!
You're welcome!
Thankyoubighelp
Thank you for watching and posting.
How do I choose the correct SIZE bottle for my needs?
Go big or stay home!! I just went with the biggest bottle and work from there.
Tri mix is expensive kelvin.. here is canada.. but its good
So, argon is the main gas.
Can i do mig without any gas? I donot need strong or good weld looks.
Just use flux core wire and your good to go.
Kevin Caron, Artist : Thank You
thanks! seems very informative, im trying to get a gift for my father for Christmas and he recently bought his first welding machine even though he has years of experience, but he didnt buy tanks of gas, i dont quite understand what i should get for him but he's working with about 1/4 inch diameter bars of some metal, any help would be great i'll try get some more info.
Thanks Great master
So nice of you
What if i use pure nitrogen in tig welding
You won't like the results! Everyone uses argon for a reason.
I'm gonna buy a eastwood 175 mig u know what's the best welding argon tank?
You don't need argon for mig. You need a mixed gas, normally 75% argon 25 % Co2. I get the biggest bottle I can so it lasts the longest.
@@KevincaronSculpture donu know a best place to order one? Or what the tank would called ?
I bought a tank that says oxygen on it is that the wrong tank?
If you are doing gas welding with acet. then no. If you are tig welding, yes, that is the wrong bottle. If you are mig welding then you really have the wrong stuff.
@@KevincaronSculpture Yes mig welding good thing I didn’t try welding with it figured out I had the wrong thing.
wanted to thank you for the explanation and the best information is using Wikipedia, I know metals arc welding for years and yes it had all the mix percentages and pointed me right to the mix that will work for this project...
+Jeremiah Ulch
you are welcome! Thanks for watching.
Your videos are the best, thx!
For my 2 tig welders I have 1 welder set for doing aluminium and magnesium and that's got a straight bottle of argon hooked up to it then . Then I have my other one that has a tri mix hooked up to it thats made up of 75 % argon , 15 % Co2 , 10 % Helium
My left ear enjoyed this video
Super Vid,Kev,, we call it 75/25 for the mig,,Unless your cheap,and use strait CO2!!!! But,,,Just My Option,, Ive found for real thin,and usually the lightest i do is 3/16 Pl.. But like 18 ga,the strait,with nice shear cut mateial,the CO2 works great!,,And the way Prices are Jumping around,,In CT.,Not like the south,the BIGGEST! bottle YOU can OWN! is the 100 cf, or some call it 80 cf.. and WOW!!!! they run out fast,so we all have to Pay the Demurage(rental) PS,,They got ya either way!!LOL,,Jack
Now Im going to have 30 gasbottles around the house all i wanted to do is fix my petched up trailer lol
You only "need" 2 or 4.. ish!
Good information
So nice of you
What if you have a mig tig and stick combo ???????????
Then you need 2 bottles! One argon and one mixed gas for mig. And hopefully a 2 bottle cart to hold them. Even better is if your 3 in 1 machine has 2 gas inlets on the back.
@@KevincaronSculpture thanks i do have 2 bottle capability and i already have a unimix 25-75 bottle
What gas is used to welding aluminium ?
Argon.
Can I use nitrogen with Tig?
Sure, you just won't like how it looks.
Thank you,
Have you been to my website yet?
Lots to see over there also...
So helium makes the weld hotter?
Correct.
thanks kervin
Turn the captions (the cc toggle next to the little cog wheel) on and choose the 'transcribe audio' option. You've got really good enunciation but the captions are quite 'interesting' at times.
Hey Kevin I'm a local Phoenician! I polish aluminum and build Rx7's and street bikes. ( hobbyist, Artist) I've watched many of your videos. Great content. I'd love to collaborate. I also have a TH-cam channel.
Right on, have to get together some day and talk about it.
I'm not sure if there's the option to pm but if you find my profile on Facebook under my name we can share contact information and set a time. My fiance is opening a brewery downtown if you like beer that's a good place to meet.
Not yet, but I'll do, thx again!
Depending what your doing tig and mig could use the same argon gas. In the shop I work when one tank runs dry we often swap it since we have one dedicated mig set up only for aluminum.
What about 100% co2?
You can use it but the results are not the best.
The trouble with Wikimedia is that anybody can edit the info ? Which might not be correct !
As is the same with anything on the internet!
Thanks for the information. Although you do sound a bit like kermit the frog.
Its probably because of high helium percentage in the shop. 😂😂😂
I thought 98/2 was the way to go when mig welding stainless steel.
Dont get Kevin started,,LOL,,He might have to call that a 5 MIX,,HAHAHAHHAH,Jack
You really have to watch this with the TH-cam captions turned on :-)
هل غاز mig هو نفسه غاز tig
NO, you will need two different gasses to make both machines work correctly.
@@KevincaronSculpture tq u so much dear
🔥🔥🔥
🇺🇸👍👍👍👍👍👍
its not easy being green. yaaaaayyyyyyyyyyy (runs away waving arms above head)...
And the green part is getting bigger!
Hilarious. So the answer is to use google/wikipedia. That's how I got here. ;) Seriously though, I'm going to go read Wikipedia right now.
Oh My God!! Voice to text has a long way to go......
Ok?!?!?!
Why?
WHAT THERES MORE THAN ONE TYPE OF GAS FOR MIG WELDING!?!?! Lol so obviously I'm being sarcastic, but there are a lot of people in industry that do not know this, and if you tell them they have the wrong gas for the task at hand! Well you can just imagine how they might react. I was told I need to go back to school. I don't consider that to be the case because school has nothing to do with it. In fact what does matter is what you are trying to do, and choosing the proper gas for that application. So I'm sorry, I'm not the one that needs to be educated. Trust me your welds will benefit from using the correct gas for the application.... I'm not even a "welder" I know that.
reminds me of the time I swam the English Channel...
...go ahead, ask me if I got gassed?
Did you?
1:26 was that a fart there, my dude?
Ya just never know!
Well Kevin I'm confused, your click bait title How to chose the right gas but isn't this really about what you use. and if it wasn't you wouldn't have suggested that we do our own search to find out what most would think what your post is about. Total waste of time. !
Thank you for posting.
Zero answer
theres no volume.
Waste of time.
Another down vote.
Volume works just fine if you turn it on. Problems on your end.