🔥 MIG Welding with 100% CO2

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!00% CO2 is certainly cheaper than buying a 75/25 MIG mix, but is it effective? Today we are going to weld a few different joint configurations with 100% CO2 to see how it performs.
Once we are done welding, we cut and etch each configuration to see how the CO2 welded parts turned out.
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[@Alasdair-Morrison]

I love the way you do your lessons No showing off Just great advice and demonstrations So easy to watch and enjoy.

[@lesstech74]

absolutely, thats why im here.

[@richmac918]

I'm beginning to think Bob could use sawdust as a shielding gas and his welds would still look good.

[@christianhilditch9333]

I have read that stick 6011 uses an organic cellulose coating made from sawdust. Without a doubt Bob can weld everything but the crack of dawn or a broken heart!

[@fpduvenhage1368]

😂

[@melaniew77msn]

When I went to Hobart 20 years ago we learned short circuit with straight CO2. I have passed many weld test with it and it makes a strong weld. I find the puddle to dig deeper and freeze faster with 100% CO2 thus making it a great choice for full pen open root welding. I am spoiled by having a proportioning gas mixer. 50% argon 50% CO2 saves some coins and does a nice job. Bob shows the most important welding skill he is adaptable. Adaptability is so important because every place you weld will expect you work to their WPS. If they tell you to stand on your head and gargle M&Ms and don't break a single candy shell then you better be able to, if you want the job! A gas mixer is a big investment but it pays for its self in time.

[@irondiver292]

What happens when a woman isn’t lied to and she chooses a career she can excel in using the gifts she’s been given. Thank you for the knowledge transfer!

[@jakeowens1770]

​@irondiver292 buddy are we talking prostitution? This is the welding channel wtf?

[@BackyardBeeKeepingNuevo]

I have learned a lot from your videos Bob. As an infrequent hobby welder I am inspired to weld more. Thanks.

[@GosselinFarmsEdGosselin]

Love your videos!. Only gas we use on steel is CO2. Friends say our welds aren't as pretty as with Argon mixtures.. They aren't. But.. when you go back and look at what the penetration differences are... And CO2 will work fairly well on dirty metal. Case in point.. big bale feeders, manure spreaders, livestock panels... We don't repair new ones.. most of that type of material is so rusted and rotted.... Best thing is good old ES70 and CO2. Same combination works well on cast too.... You can even weld mild to cast and have it stay together! (I know, I know... The books and the smart guys say it won't work... LoL.. it does work!

[@cornwasher]

Another great video and laying down some beautiful welds...

[@JeepITguy]

"Wow, I should be a welder, that's kinda nice" LOL. Thanks for what you do, sir. You've saved me a lot of time and expense!

[@ryanblanco5866]

Got me a tank of co2 and some er70s-6 and now im starting to learn watching your vids.

[@etebol]

Hey Mr Moffatt, repurposed welder here, coming from retail management I really appreciate you sharing your knowledge in a way I can understand. I am in Anchorage and we are using CO2 straight because it is cheap, the instructor said if you can weld with CO2 you will be able to weld with 75/25.

[@fromthebackofmymind]

Thank you for this video. You were already welding as a tradesmen when I was still in High School welding class.Your videos are par excellance. Safety first. Off gassing captured in a ventillation system. I cannot begin to tell you in the value of that. As a kid using lead based solder for my little RC car projects and ignorantly breathing acid core fumes. Trying to solder join brass rod into a chassis. Yet I had asked my Father to buy me the then new, plastic model glue that was safe. Again, I enjoy your videos, Sir.

[@roseironworks1393]

It's about time we saw this camera guy do some welding !,

[@TheZzziggy]

Dear uncle Bob, thanks a lot for cut'n'etched shots!

[@andysteele8267]

15 years ago i was working for division of Panasonic that made refrigerator compressors. We used automated mig welders with 0.065 wire and CO2 gas. The gas came in on 18 wheelers and was stored in a tank about 40 ft tall. We used a lot of CO2.

[@victorlaramayo7200]

Excelente demostración Sr ....sus vídeos me ayudan mucho.....saludos

[@richardreichow1969]

Forget the welding ! Just a superb video !

[@vanderhoof5701]

The weld's looking pretty good there. Been laying down ER70 with straight C02 for 30 yrs, works great for me up to 3/8, push, drag, in contortionist the spatter hurts a bit.

[@osamaumar9822]

Thank you sir for all your free help

[@Fireship1]

Very nice technique. Your beads look like art!

[@kevinmcneeely7277]

Man I wish I could Weld like this guy. I’m learning

[@skiptracer8703]

Nice lesson thanks

[@BMRStudio]

Short strong ark, but somehow the finished weld looks nice under his hand. I will try this, just to see the difference:) THX!

[@jakeg4070]

Those were soom nice Macro's. Keep up the good work.

[@charliehumber6383]

Cold looking welds those first 2

[@marshpronneke6492]

Small world Bob, when you said you worked at Heater Technology in the 70's in Ponca City that rang a bell. I lived in Ponca City & area for 40 years and went by HT quiet often. A lot has changed there since the 70's and in just the last 8 years since we moved away to TX. Enjoyed your video presentation as well.

[@garyscoville7741]

Hay Bob. Gary from CT here. This has nothing to do with the topic but more with my selfish need to know. Well, I finally got my Esab 235 up and running. Man, what a mess I made of my first weld in 30 years! I gotta get some pictures out to ya so you can be embarrassed along with me! One thing I did was the wrong polarity. After that discovery, I don't know why my welds still look like crap. Anyway, I'll shoot some pics out to you shortly. Oh ya, my first project was welding my new "Tap & Slot" table together. Shure hope I didn't screw it up.

[@gilbertogandarilla8507]

Gary Scoville play whit the settings meavy you ned mor o lees wire or mor o lees volts

[@shawnsderbyden1032]

Im glad youdid this i have been looking for a video showing this i build derby cars and try to keep the cost down and im waning to switch from gassless flux to running this stright co2

[@bobmoffatt4133]

Definitely a little cheaper running hard wire and CO2.

[@mrjata]

straight CO2 works just fine for me. Building a street rod now, good penetration w/.030 and CO2. You get a little spatter, no biggy. No where near what arc is! the wire speed and current will effect the spatter too. Clean metal is a must! No rust!

[@kevinbaker8102]

I have always used straight c o 2 I do trailer repair have had no problems

[@peanutsmith1462]

Man I sure wish you would come back to KZbin and make more videos I miss you man

[@mainelyelectric]

Where did he go?

[@jatwangismyname900]

Welds looking great

[@KatyLynnWinery]

Thanks for the money savings and enjoyed learning about the history of using just CO2.

[@michaelrobertson8795]

Very cool, I used to go to Ponca City and hang out with some friends down their webs I guess laile stagner passed away that own that place last week👍

[@borisparrill]

Thank you for the video

[@ericrachal6133]

Thanks for adding video... Question... What was your c02 gas set at ?

[@GosselinFarmsEdGosselin]

Except for aluminum, I've only run CO2, all the old information showed it had better penetration....some say it just isn't as pretty. I see a few comments about your exhaust fan.... With CO2, even a slight breeze can screw up your weld. When having to drag the welder outside the shop doors, I've found you need to block any wind. Either with your body, or hand held close to the end of the gun....

[@atcaleb]

Wow thats a nice bead at the end there. Double wow.

[@patrickfarley8036]

I really think the vent was the problem with the porosity on the last weld. I wish you would have run one more outside corner without the vent so close if at all just to be sure one way or the other. What do you consider to be the starting thickness of "the heavy stuff" where you would swap gas to C25 or keep the co2 and switch to fluxcore? Thanks!

[@curlynigero6417]

Good welding skills

[@rodneycassidy6037]

We use straight Co2 with dual shield and I hate it. Mixed gas is so much smoother. Also the other benefit of Co2 is it is liquid so for mobile welding you can carry a lot more gas in the same size bottle.

[@carolshawol6699]

C25 is cleaner but it makes a more brittle weld that's why if you look on the data information on the packages it's with straight co2 that's what they really should be ran with i also don't like the spatter

[@TheBigGuyGarage]

i use co2 all the time on my hobart 187. C25 is really high in my area and i only have a 80lb tank. co2 goes by lb but its same as 80cf c25

[@candyman5749]

I ran it years ago in a structural steel fab shop on heavy iron. It was hard to go from 75/25 to pure CO2. Once you learn how to work it it seems to have the highest deposition rate and makes a very heavy rippled weld, which many codes don't allow.

[@famvdlaan9027]

Hi Bob, thanks for the video! Finally some straight co2. Can you do heavy plating with 100% CO2 next?

[@krazziee2000]

thanks for the video

[@jaysonlorenzon88]

Nice video. I would Love to see some carbon arc welding/brazing

[@bushratbeachbum]

Well, always learning!! I thought straight c02 was better for heavy stuff as it helps burn in harder. Off to do more research!

[@craigkeller]

Thanks for saving me some money...

[@karolthiesen4707]

Ditto for me. I weld with my Everlast mig as a hobby and CO2 looks like the way to go.

[@magnum357225]

I have only used co2 for welding until two years ago where i changed to what we call feromix which is 75% argon 25% co2. You can make a nice weld there is only more splater

[@tkigrntmb5344]

"Wow! I should be a welder"... was running this video as background noise and bout had oj come out my nose 💀💀💀

[@eduardovillena6084]

Can you also discuss about pros and cons of fluxcored dual shield using straight CO2 and it's limitations. It will help us alot for a hobbiest like me.

[@luciusirving5926]

One disadvantage with fluxed-core is that you get more fumes or more porosity. Sometimes you have trouble controlling the arc. My 6013 electrode could penetrate better and provide more control of the arc.

[@collinholleran5508]

Need to take a test for a job, have to run a fillet weld on a T joint in the vertical position downhill. Gas is 100% co2, wire is .40 (1mm) on 6mm material (about 1/4”) any tips or suggestions? Nether the weld specialist nor I can seem to get proper fusion.

[@ArcticFlies56]

Very interesting. I’m not a welder but I was thinking about getting unit that I can do small stuff with for a hobby. I see you use an exhaust to pull the gas and smoke away from you. You’re the only one I’ve seen so far that uses the exhaust. I would be interested in using one too because I really don’t want to breath that stuff in. Would an exhaust fan used to pull heat out of a garage be good enough for this purpose?

[@angelitopineda3278]

Hi sir , Do you have a demo for setting the co2 gas sir ?

[@ScinnerNo1]

Just to clarify things here, welding with only CO2 is called MAG welding. When MIG welding you use an inert gas. CO2 is not an inert gas. These gases are inert: helium (He), neon (Ne), argon (Ar), krypton (Kr) och xenon (Xe).

[@mitchdenner9743]

GMAW, is that acceptable for you .

[@ScinnerNo1]

@@mitchdenner9743 Sure.

[@theaussie7160]

Can u hook up argon and co2 to run in the same hose and make adjustments to what ever your liking or situation

[@mitchdenner9743]

@@theaussie7160 yep, seen a few manifold systems setup so you can control different percentages of gas you want. Custom mixtures .

[@eduardosampoia5480]

When we say mig it's understood that it is mig or mag. Nobody calls it mag...nobody.

[@bigTONK-Q]

can co2 for aquascape be used for mig welding..?

[@Rwhatify]

Any tips with dialing in Co2 with the inverter ESAB? I previously used a miller 211 and it was not to finicky with Co2. Tried the SMIG (smart Mig) with Co2 and was not great. ESAB tech support said it would work. I been trying to dial the settings in for Co2 and not having the greatest results.

[@markgallagherus]

Hi Bob got a quick question for you. I have a MIG welder and am looking at some shielding gas. I was thinking of going with CO2. I see where the gas suppliers offer two versions of CO2 one with a siphon tube and the other just gas without the tube. The siphon seems to be to transfer liquid CO2 to another container example paintball. Is the cylinder without the siphon the one used for MIG shielding with CO2 using a CO2 regulator?

[@mosalim7119]

greate thanks for the vedios can you please make a vedio on electrode movment types and there effect on bead shape as well as mig thanks

[@alexschmidt5188]

I've been using straight co2 for about 4 years on exhaust tubing, sheet metal and roll cage mount plates. The cost savings crazy! I use a keg cylinder. it? 20 bucks to fill and lasts 3/4 times as long as the same size c25 or tri-mix.

[@fishhuntadventure]

Alex Schmidt 3 to 4 not 3/4?

[@sunrisetacticalgear29]

1 lb of CO2 gives 8.7 cf of gas. So the 20lb tank of CO2 will give approx the same amount of gas as a 172cf tank (chest height, skinny tank) of 75/25 at about $80 depending on your supplier.

[@howardjohnson5734]

like weld com stated "turn up the voltage to high and it becomes unstable "it is ok for some applications one thing i noticed switching from c10 to co2 is having to control the arc length more precisely. if it gets to long with c02 it starts to make lots of b bs

[@cedriczgood9590]

Hi ! And you do it with normal wire ? What kind of metal is it ? Thx.

[@francesnieznay6623]

I am with James still use streight co2 miller 35 ,just patch around the house now,retired.

[@ianmckenzie8245]

Just when I thought my welding was getting better I see this guy!!!...........

[@c4call]

Newbies at my work occasionally do better work. Ideally you don't want that convex profile that he was so proud of. The weld should be as close to flat as possible

[@jomarortiz209]

Hey, what kind of regulator i need to weld with straight co2? I have a hobart 140 and I bought the adapter for c25 to co2, but don’t work very good. What i need. Thanks

[@trailerfitter2]

Bob. Could you show is some mitred tubing /welding techniques please?

[@bobmoffatt4133]

Land Rover Toolbox Videos We have already.

[@becauseboost4726]

What kind of wire are you running here and why do you make the pattern? Is the pattern required to run .035? I'm asking because I'm trying to improve my welds running my .030 with 75/25 and I don't use a pattern.

[@bobmoffatt4133]

joshua kuntz Pattern is not necessary.

[@RobertsVintageGardenTractors]

I use straight co2 on my little lincoln and c25 on my big lincoln.

[@eueu1244]

good afternoon. I have machine mig without gas, can I adapt to gas ?? install regulator for gas and pipes

[@mainelyelectric]

I have a small mig for basic farm repairs and hobbies plus sculpture building I run C25 but could I get away with just CO2?? Also even though they are large they have aluminum CO2 tanks at my local growers supply store is that the same CO2 if the valve is the same?? Thanks

[@marzsit9833]

in trade school we were taught that mig welding with pure c02 was best for repair work on dirty, rusty, oily steel that you could not properly clean up before welding. yes, the welds don't look pretty and on dirty material you do get a lot of spatter and slag, but it will give you a strong weld. of course, in those days stick welding was used most of the time under those conditions, but if you didn't have a stick welder and only had a mig, that was the best way to go. in my home garage i only have a mig welder and use 75/25 steel mix most of the time, but i do have co2 tanks and a c02 flowmeter if i need it, and i do use it sometimes.

[@jdinness1613]

At My shop we are all structural and all we run is 💯 co2 with fcaw and I usually run 26 at 320 and I still get a lot of splatter once in while so clean up is a bit of pain sometimes lol 😆 I’ve learned to get use to it

[@WTFChuk]

I've done my share of MIG with straight CO2. In some ways I like it better than C25. For my own personal use I run C15. Much less spatter than C25, nicer arc, and you can spray with it. It's not as hot, but I don't generally MIG weld anything really heavy so it's not a big deal.

[@MrLegacy36]

I’m a hobbyist welder, I want to make a winch plate, and super strong tube bumper for my truck, and I do have a CO2 bottle do you think that kinda stuff is good for CO2? I want to avoid spending the few hundred on a new argon mix bottle and fill

[@bradthurkle7217]

Can you use oxygen/ the black bottles as a shield or I suppose that’s exactly what you want to keep out.?

[@bchant19]

could you talk a little bit about how you can dial in the arc with the inductance control for using the Co2 gas

[@davidmarquardt2445]

I saw that on an older Mig Mondays episode with the other guy ( can't think of his name). He had a higher end ESAB machine with user adjustable inductance. He said most machines were factory set around 35 or 40. He turned it down to 0 and the arc seemed softer and the bead flatter, then he turned it up to like 85 and the arc was sharper with tighter bead ripples. It wasn't a big difference but I think he did say you could fine tune it and take out a lot of the spatter with CO2.

[@hcdt520]

What helmet are using on the camera when filming your weld

[@baronvonchickenpants6564]

I used to use it for car body work years ago with a 100amp transformer sealey mighty mig The wire feeder broke some years back, I've just bought an inverter mig 200amp using 25/75 and I'm sure the Old set up was easier More controllable didn't blow holes so easily and if you did, it was easier to fill them, the only downside was the spatter, am I remembering it wrong?

[@MisterCheemf]

I hate welding straight co2 that's all we have in our work. Before the bean counters came in and were too tight fisted, we used to have 75/25.

[@ccmangb]

In Thailand, the standard gas for mig welding is straight CO2 to the point that mig welding is referred to as CO2 welding (and tig is argon welding, while stick welding is "joss stick" welding). It's pretty hard to find a gas supplier that stocks mixed gasses, it's mostly by order and much more expensive than straight gasses. The only mix that's stocked by some places is 80-20 argon CO2, and only in very small quantities.

[@andrewdoesyt7787]

Question, if you’re welding carbon steel with TIG, then can you use CO2 as a gas, or would that ruin the tungsten?

[@ccmangb]

@@andrewdoesyt7787 I have no idea why you're asking me of all people, but generally for tig you always use 100% argon with all metals, except for dc (ac uses argon) aluminum welding, which traditionally uses helium.

[@luciusirving5926]

@@andrewdoesyt7787 The tungsten rod would be ruined as mentioned on Wokepedia. GTAW fuses the most metals, but GMAW uses the most shielding gases, including SF6.

[@luciusirving5926]

Yes, welding in Thailand is a whole other ballgame.

[@sswcustomsewing4276]

What are your thoughts about using CO2 with flux core wire ?

[@cammurray8453]

Bob, I remember doing mig welds using straight CO2 in a manufacturing environment 40 years ago. There were both 040 hard wire and 060? Dual shield. There were no stitch/step motion just drag and weaves. Material thicknesses from 1/8 to stack ups over 1". What is the purpose of the stitch motion?

[@impactodelsurenterprise2440]

Tie in the toes and heels. Kinda like a workaround for a small machine that just isn't capable of dumping heat into the part.

[@cryoburned]

Bob what's up with the beads on that plate? I must have missed that part of the episode? I've heard conflicting stories on CO2.. That it's a hotter arc, good for pushing small machines on heavier stuff (like helium on aluminum) and some say the colder gas cools the arc/weld making it good for ..something..? What's the skinny?

[@bobmoffatt4133]

It is a slightly hotter arc. Cheaper than argon/ co2 blend.

[@matthewisaac6895]

I've been doing a lot of auto body sheet metal welding, exhaust pipes, stuff like that and switched from C25 to straight CO2 a few years back, my experience is that the weld on CO2 doesn't wet in the same way as C25 and for a given material thickness i find need to run a higher voltage and a bit lower wire speed. I can definitely weld thinner material without blowing through than I could with C25. CO2 has a smaller sweet spot than C25 but when you get it dialled in it works great.

[@thebloodline0521]

I weld for 35 years. I was. Welder class A. I run all kinds of welding. Very good work. Clean and good money. $ 🌶🇲🇽🇺🇸

[@scottstangguy2889]

Do you have any videos on mig with 90/10 gas?

[@TheMohaned997]

Welcome to what best gas solder at 100% Arcon or Co2% and thank you

[@Genschannel]

I’m still learning but what I can’t work out is what side of the puddle am I too watch, the front or rear? I’m learning to try and weld any direction being right handed but I find sometimes it’s easier if I drag or push depending but other say only drag gassles and etc. thanks

[@AHill-oi9ct]

It doesn't really make a difference. Pushing lays a flatter bead. Dragging penetrates a little more. Pushing is preferred but the will be times when you have to drag. I tend to look all around the puddle. Watching where I'm going as well as trying to control bead size

[@bobbicakep9561]

Apik tenan.

[@antaresko1]

Good morning! when is MIG is inerte gas, in this case Argor or Helium, and all the rest : Oxigen, Co2, Nitrogen or mix gases with argón or helium is Active gas (MAG)

[@nzsaltflatsracer8054]

I got my first mig back in the 70's & have run straight CO2 ever since. I just spent most of today welding on a race chassis.

[@myscout1]

Very much a hobbyist welder. Just found this channel and i was wondering if you would ever do a comparison of the new Vulcan MigMax 215 from Harbor Freight vs. a name brand. Is it worth the money? Thank you I appreciate any info and sorry if this is not where I should be posting this question.

[@Welddotcom]

We just got in some of the new Vulcan machine to play around with. Haven't got a chance to use them yet, but we're in the process. Hit that subscribe button and you'll get notified when the video comes out.

[@dvegard]

Try to get a clip & honest review of that Vulcan Omni220MP before the sale goes off at harbor freight on the 30th! I'm looking to get an MP welder, if it's not rubbish, I'm in... especially with the 1 year trial.

[@tylerloyd4207]

hey my dad went to cowley college! are you from ark city kansas by any chance?

[@champtree]

Another great chapter of learning. So your what's your cameraman's middle name? Guy is a cool last name.

[@metalman6050]

It has been several years since I used pure Co2 with regular .030 mig wire, but when I did , it was with an older Miller CC.CV unit where you had an adjustment for impedence and slope on it! I set it for about 300 inches per minute wire speed,, voltage around 35, slope aroune E, can't remember impedance # of hand. Set the gas flow around 20 CFM I was welding cast flanges to 14 gauge aluminized sheet metal and it flowed in like butter!. No spatter or any excessive over weld you had to grind off!

[@zanpekosak2383]

I am loving the audio improvment! Did you buy a Lavalier microphone or is it a voice over?

[@bobmoffatt4133]

We've been using Lavaliere wireless mics for years!! No voice overs here.

[@zanpekosak2383]

Than its probably just me. It just sound better to me...

[@jibba0202]

As a home brewer and someone that welds twice a year, co2 is the obvious choice.

[@theomnipresent1]

I was always told pure CO2 gets you more penetration, meant for heavy stuff. At the end you said the opposite?

[@davidmarquardt2445]

Yes CO2 does give you deeper penetration, but more spatter. C25 (25% CO2/75% argon) was developed for production welding to cut down on spatter removal on finished parts, when the arc is setup right their is virtually no spatter to remove. Also C25 has a cooler arc than 100% CO2, so less chance of burn through on thin sheet. But if you are doing structural welding on heavy beams and plate, then CO2 is the way to go. Deep penetration is what you need here, and the heavy spatter is not a problem since it's not going to be painted and sent out like a snowblower. As I understand it the way CO2 works is that it has high arc resistance and the arc splits the CO2 molecule and for a split second it becomes CO (carbon monoxide) it then relishes this extra energy to the puddle and recombines again as CO2. In stick welding the 6010 or 6011(the AC version of the 6010) the flux coating is cellulose which produces a CO2/CO atmosphere as shielding.

[@hunterbodell1129]

Would co2 be better than nothing for finish welds? Or does it make the weld spatter more?

[@dannypatrick8671]

@@hunterbodell1129 read your question. I have been welding as a living for over 50 yrs and have found spatter depends on , wire quality or brand, cleanliness of the steel, cold or hot rolled, type of gas used and most of all the settings on the welder and welding style (push or pull) I use straight co2 for flux core weld and C25 for mig wire. Use whatever works best for you, experiment and have fun with with different techniques

[@tater0909]

I know why the exhaust fan is there, but turn it off and stop the draft and see if it effects the weld. Could be pulling the gas away too quick

[@frankw7266]

Was thinking the same... you could really see it pulling on the third (outside corner) weld.

[@1royalwolf]

Nice penno on the verti down. I always thought deep penetration was the advantage of co2 but the fillet welds only just burnt past the corners on the macro. Maybe they needed higher voltage. Thanks for the vid.

[@justinprice9590]

The vent could be pulling gas and heat away from the weld

[@purebloodheretic4682]

Is it OK to Drag the Weld with Co2? - I was always Taught to Push the Weld for Penetration, Ive only ever used Argon/Co2 mix, I might drag the weld on Sheet Metal to avoid Burn through, Thats about it Though! -Cheers👍😉

[@c4call]

No no nooo, to avoid burn through, pushing is better than dragging. Like you said in your comment, dragging gets better penetration. I did structural steel for 3 years and now I work with stainless and stainless-to-mild, building train cars, and with either mild or stainless (but even moreso with stainless), if you wanna weld thin stuff, you go hotter and faster, as fast as you can make a decent weld, and push if possible, to avoid burn through or suckback, on thin gauge. Ive welded 3 inch thick mild, and I currently weld as thin as 1.5mm stainless, and pushing FAST is the best option. Go too cold and slow and risk actually putting in too much heat because of your slow travel rate. And if you drag, you'll definitely have it melt out, and you'll have a lovely glob of metal to grind out on the other side, as well as having to tack-tack-tack to fill-in the gap you just created because you dragged

[@aleksandarpetrovic6613]

If I hear right, you weld stainless steel with SS wire and CO2 gas??

[@rickolson9011]

I must have missed the part where you stated the CO2 flow rate and how changing it affects the weld. Please comment on if/how you change the flow for different joint types. Thanks for this as I only have a choice of flux core, solid wire with CO2, or flux core with CO2. ALSO DO YOU CHANGE POLARITY WITH THE DIFFERENT COMBOS/

[@Welddotcom]

You don't change the polarity from CO2 to 75/25, but you do change from MIG to Flux Cored. Our flow rate was around 25CFH.

[@leonardpearlman4017]

They've been over this a dozen times, but just in case: The Innershield and the Outershield Wire use different polarity! You only have to change polarity for self-shielded ("gasless") wire!

[@r3drumg33k3]

Thought co2 was worse on thinner steel as it is best for deaper penetration